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https://gitee.com/Lyon1998/pikapython.git
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add IIC.c for std device and stm32
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lyon1998
parent
287bb06ecf
commit
29c3c5b3b0
54
package/PikaStdDevice/PikaStdDevice_IIC.c
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54
package/PikaStdDevice/PikaStdDevice_IIC.c
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#include "PikaStdDevice_IIC.h"
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#include "STM32_GPIO.h"
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#include "BaseObj.h"
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#include "PikaObj.h"
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void PikaStdDevice_IIC_init(PikaObj *self){
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obj_run(self, "deviceAddr = 0");
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obj_run(self, "SCLpin = 'PA0'");
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obj_run(self, "SDApin = 'PA1'");
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}
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void PikaStdDevice_IIC_enable(PikaObj *self){
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obj_run(self, "platformEnable()");
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}
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void PikaStdDevice_IIC_setDeviceAddr(PikaObj *self, int addr){
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obj_setInt(self, "deviceAddr", addr);
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}
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void PikaStdDevice_IIC_setPinSCL(PikaObj *self, char * pin){
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obj_setStr(self, "SCLpin", pin);
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}
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void PikaStdDevice_IIC_setPinSDA(PikaObj *self, char * pin){
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obj_setStr(self, "SDApin", pin);
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}
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void PikaStdDevice_IIC_write(PikaObj *self, int addr, char * data){
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obj_setStr(self, "writeData", data);
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obj_setInt(self, "writeAddr", addr);
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obj_run(self, "platformWrite(writeAddr, writeData)");
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}
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char * PikaStdDevice_IIC_read(PikaObj *self, int addr, int length){
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obj_setInt(self, "length", length);
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obj_setInt(self, "readAddr", addr);
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obj_run(self, "readData = platformRead(readAddr, length)");
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return obj_getStr(self, "readData");
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}
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void PikaStdDevice_IIC_platformWrite(PikaObj *self, int addr, char * data){
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obj_setErrorCode(self, 1);
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obj_setSysOut(self, "[error] platform method need to be override.");
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}
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void PikaStdDevice_IIC_platformEnable(PikaObj *self){
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obj_setErrorCode(self, 1);
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obj_setSysOut(self, "[error] platform method need to be override.");
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}
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char * PikaStdDevice_IIC_platformRead(PikaObj *self, int addr, int length){
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obj_setErrorCode(self, 1);
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obj_setSysOut(self, "[error] platform method need to be override.");
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return NULL;
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}
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247
package/STM32/STM32_IIC.c
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247
package/STM32/STM32_IIC.c
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#include "STM32_IIC.h"
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#include <stdint.h>
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#include "BaseObj.h"
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#include "STM32_common.h"
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#include "STM32_GPIO.h"
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#include "dataStrs.h"
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typedef struct pika_IIC_info_t{
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GPIO_TypeDef *SCL_GPIO;
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GPIO_TypeDef *SDA_GPIO;
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uint32_t SCL_GPIO_Pin;
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uint32_t SDA_GPIO_Pin;
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uint8_t deviceAddr;
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uint8_t readBuff[32];
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}pika_IIC_info;
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#define delay_rate 1
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void SDA_OUT(pika_IIC_info *iic){
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GPIO_InitTypeDef GPIO_InitStruct = {0};
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/*Configure GPIO*/
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GPIO_InitStruct.Pin = iic->SDA_GPIO_Pin;
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GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP ;
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GPIO_InitStruct.Pull = GPIO_PULLUP;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
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HAL_GPIO_Init(iic->SDA_GPIO, &GPIO_InitStruct);
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}
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void SDA_IN(pika_IIC_info *iic){
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GPIO_InitTypeDef GPIO_InitStruct = {0};
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/*Configure GPIO*/
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GPIO_InitStruct.Pin = iic->SDA_GPIO_Pin;
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GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
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GPIO_InitStruct.Pull = GPIO_PULLUP;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
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HAL_GPIO_Init(iic->SDA_GPIO, &GPIO_InitStruct);
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}
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void IIC_SDA_high(pika_IIC_info *iic){
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HAL_GPIO_WritePin(iic->SDA_GPIO, iic->SDA_GPIO_Pin, GPIO_PIN_SET);
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}
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void IIC_SDA_low(pika_IIC_info *iic){
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HAL_GPIO_WritePin(iic->SDA_GPIO, iic->SDA_GPIO_Pin, GPIO_PIN_RESET);
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}
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void IIC_SCL_high(pika_IIC_info *iic){
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HAL_GPIO_WritePin(iic->SCL_GPIO, iic->SCL_GPIO_Pin, GPIO_PIN_SET);
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}
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void IIC_SCL_low(pika_IIC_info *iic){
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HAL_GPIO_WritePin(iic->SCL_GPIO, iic->SCL_GPIO_Pin, GPIO_PIN_RESET);
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}
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uint8_t READ_SDA(pika_IIC_info *iic){
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return HAL_GPIO_ReadPin(iic->SDA_GPIO, iic->SDA_GPIO_Pin);
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}
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void WRITE_SDA(pika_IIC_info *iic, uint8_t data){
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HAL_GPIO_WritePin(iic->SDA_GPIO, iic->SDA_GPIO_Pin, data);
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}
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void IIC_Start(pika_IIC_info *iic) {
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SDA_OUT(iic);
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IIC_SDA_high(iic);
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IIC_SCL_high(iic);
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delay_us(delay_rate * 4);
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IIC_SDA_low(iic);
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delay_us(delay_rate * 4);
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IIC_SCL_low(iic);
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}
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void IIC_Stop(pika_IIC_info *iic) {
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SDA_OUT(iic);
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IIC_SCL_low(iic);
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IIC_SDA_low(iic);
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delay_us(delay_rate * 4);
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IIC_SCL_high(iic);
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IIC_SDA_high(iic);
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delay_us(delay_rate * 4);
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}
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uint8_t IIC_Wait_Ack(pika_IIC_info *iic) {
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uint8_t ucErrTime = 0;
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SDA_IN(iic);
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IIC_SDA_high(iic);
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delay_us(delay_rate * 1);
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IIC_SCL_high(iic);
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delay_us(delay_rate * 1);
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while (READ_SDA(iic)) {
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ucErrTime++;
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if (ucErrTime > 250) {
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IIC_Stop(iic);
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return 1;
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}
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}
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IIC_SCL_low(iic);
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return 0;
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}
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void IIC_Ack(pika_IIC_info *iic) {
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IIC_SCL_low(iic);
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SDA_OUT(iic);
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IIC_SDA_low(iic);
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delay_us(delay_rate * 2);
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IIC_SCL_high(iic);
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delay_us(delay_rate * 2);
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IIC_SCL_low(iic);
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}
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void IIC_NAck(pika_IIC_info *iic) {
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IIC_SCL_low(iic);
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SDA_OUT(iic);
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IIC_SDA_high(iic);
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delay_us(delay_rate * 2);
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IIC_SCL_high(iic);
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delay_us(delay_rate * 2);
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IIC_SCL_low(iic);
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}
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void IIC_Send_Byte(pika_IIC_info *iic, uint8_t txd) {
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uint8_t t;
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SDA_OUT(iic);
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IIC_SCL_low(iic);
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for (t = 0; t < 8; t++) {
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WRITE_SDA(iic, (txd & 0x80) >> 7);
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txd <<= 1;
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delay_us(delay_rate * 2);
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IIC_SCL_high(iic);
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delay_us(delay_rate * 2);
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IIC_SCL_low(iic);
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delay_us(delay_rate * 2);
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}
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}
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uint8_t IIC_Read_Byte(pika_IIC_info *iic, unsigned char ack) {
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unsigned char i, receive = 0;
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SDA_IN(iic);
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for (i = 0; i < 8; i++) {
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IIC_SCL_low(iic);
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delay_us(delay_rate * 2);
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IIC_SCL_high(iic);
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receive <<= 1;
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if (READ_SDA(iic))
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receive++;
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delay_us(delay_rate * 1);
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}
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if (!ack)
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IIC_NAck(iic);
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else
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IIC_Ack(iic);
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return receive;
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}
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uint8_t MPU_Write_Len(pika_IIC_info *iic, uint8_t addr, uint8_t reg, uint8_t len, uint8_t* buf) {
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uint8_t i;
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IIC_Start(iic);
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IIC_Send_Byte(iic, (addr << 1) | 0);
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if (IIC_Wait_Ack(iic)) {
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IIC_Stop(iic);
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return 1;
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}
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IIC_Send_Byte(iic, reg);
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IIC_Wait_Ack(iic);
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for (i = 0; i < len; i++) {
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IIC_Send_Byte(iic, buf[i]);
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if (IIC_Wait_Ack(iic)) {
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IIC_Stop(iic);
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return 1;
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}
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}
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IIC_Stop(iic);
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return 0;
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}
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uint8_t MPU_Read_Len(pika_IIC_info *iic, uint8_t addr, uint8_t reg, uint8_t len, uint8_t* buf) {
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IIC_Start(iic);
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IIC_Send_Byte(iic, (addr << 1) | 0);
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if (IIC_Wait_Ack(iic)) {
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IIC_Stop(iic);
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return 1;
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}
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IIC_Send_Byte(iic, reg);
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IIC_Wait_Ack(iic);
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IIC_Start(iic);
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IIC_Send_Byte(iic, (addr << 1) | 1);
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IIC_Wait_Ack(iic);
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while (len) {
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if (len == 1)
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*buf = IIC_Read_Byte(iic, 0);
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else
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*buf = IIC_Read_Byte(iic, 1);
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len--;
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buf++;
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}
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IIC_Stop(iic);
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return 0;
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}
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void STM32_IIC_platformEnable(PikaObj *self){
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obj_run(self, "SCL.init()");
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obj_run(self, "SDA.init()");
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obj_run(self, "SCL.setPin(SCLpin)");
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obj_run(self, "SDA.setPin(SDApin)");
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obj_run(self, "SCL.setMode('out')");
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obj_run(self, "SDA.setMode('out')");
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obj_run(self, "SCL.enable()");
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obj_run(self, "SDA.enable()");
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obj_run(self, "SCL.low()");
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obj_run(self, "SDA.low()");
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char *SCLpin = obj_getStr(self, "SCLpin");
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char *SDApin = obj_getStr(self, "SDApin");
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uint8_t deviceAddr = obj_getInt(self, "deviceAddr");
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pika_IIC_info *iic = obj_getPtr(self, "iic");
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if(NULL == iic){
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iic = pikaMalloc(sizeof(pika_IIC_info));
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obj_setPtr(self, "iic", iic);
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}
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iic->SDA_GPIO = getGpioPort(SDApin);
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iic->SDA_GPIO_Pin = getGpioPin(SDApin);
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iic->SCL_GPIO = getGpioPort(SCLpin);
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iic->SCL_GPIO_Pin = getGpioPin(SCLpin);
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iic->deviceAddr = deviceAddr;
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SDA_OUT(iic);
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}
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char * STM32_IIC_platformRead(PikaObj *self, int addr, int length){
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pika_IIC_info *iic = obj_getPtr(self, "iic");
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MPU_Read_Len(iic, iic->deviceAddr, addr, length,(uint8_t *) iic->readBuff);
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return (char *)iic->readBuff;
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}
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void STM32_IIC_platformWrite(PikaObj *self, int addr, char * data){
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pika_IIC_info *iic = obj_getPtr(self, "iic");
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MPU_Write_Len(iic, iic->deviceAddr, addr, strGetSize(data), (uint8_t *)data);
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}
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