/**
 * @file shell_port.c
 * @author Letter (NevermindZZT@gmail.com)
 * @brief 
 * @version 0.1
 * @date 2019-02-22
 * 
 * @copyright (c) 2019 Letter
 * 
 */

#include "shell.h"
#include "freertos/FreeRTOS.h"
#include "driver/uart.h"


#define     SHELL_UART      UART_NUM_0


Shell shell;
char shellBuffer[512];

/**
 * @brief 用户shell写
 * 
 * @param data 数据
 */
void userShellWrite(char data)
{
    uart_write_bytes(SHELL_UART, (const char *)&data, 1);
}


/**
 * @brief 用户shell读
 * 
 * @param data 数据
 * @return char 状态
 */
signed char userShellRead(char *data)
{
    return (uart_read_bytes(SHELL_UART, (uint8_t *)data, 1, portMAX_DELAY) == 1)
        ? 0 : -1;
}


/**
 * @brief 用户shell初始化
 * 
 */
void userShellInit(void)
{
    uart_config_t uartConfig = {
        .baud_rate = 115200,
        .data_bits = UART_DATA_8_BITS,
        .parity    = UART_PARITY_DISABLE,
        .stop_bits = UART_STOP_BITS_1,
        .flow_ctrl = UART_HW_FLOWCTRL_DISABLE
    };
    uart_param_config(SHELL_UART, &uartConfig);
    uart_driver_install(SHELL_UART, 256 * 2, 0, 0, NULL, 0);
    shell.write = userShellWrite;
    shell.read = userShellRead;
    shellInit(&shell, shellBuffer, 512);
}