main.c

#include <string.h>

/* SmartFusion */
#include "a2fxxxm3.h"
#include "core_cm3.h"
#include "mss_gpio.h"
#include "mss_watchdog.h"
#include "mss_uart.h"
#include "mss_pdma.h"

/* FreeRTOS */
#include "FreeRTOS.h"
#include "task.h"

/**/
#include "printf.h"
#include "utils.h"

#include "LoggerTask.h"

void vApplicationIdleHook( void ) {
    SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;
}

static void taskBlink(void * params) {
    while (1) {
        MSS_WD_reload();
        GPIO->GPIO_OUT ^= MSS_GPIO_28_MASK;
        vTaskDelay(pdMS_TO_TICKS(250));
    }
}

static volatile uint8_t pdmaChannel0TxCompleted = 0;

static void pdmaChannel0IsrHandler() {
    pdmaChannel0TxCompleted = 1;
    PDMA_disable_irq(PDMA_CHANNEL_0);   /* Important! */
}

static void welcome() {
    char buf[256];
    printUART("Welcome! (polled transmit)\n");
    PDMA_configure(
        PDMA_CHANNEL_0,
        PDMA_TO_UART_0,
        PDMA_LOW_PRIORITY | PDMA_BYTE_TRANSFER | PDMA_INC_SRC_ONE_BYTE,
        PDMA_DEFAULT_WRITE_ADJ
    );
    PDMA_set_irq_handler(PDMA_CHANNEL_0, pdmaChannel0IsrHandler);
    sprintf(buf, "Welcome! (DMA transmit)\n");
    PDMA_start(
        PDMA_CHANNEL_0,
        (uint32_t)buf,  /* Important! Source must be in RAM not eNVM !!! */
        PDMA_UART0_TX_REGISTER,
        strlen(buf)
    );
    while (!pdmaChannel0TxCompleted);
}

static void init() {
    MSS_GPIO_init();
    MSS_GPIO_config( MSS_GPIO_31 , MSS_GPIO_OUTPUT_MODE );
    MSS_GPIO_config( MSS_GPIO_30 , MSS_GPIO_OUTPUT_MODE );
    MSS_GPIO_config( MSS_GPIO_29 , MSS_GPIO_OUTPUT_MODE );
    MSS_GPIO_config( MSS_GPIO_28 , MSS_GPIO_OUTPUT_MODE );
    MSS_GPIO_set_outputs(
        MSS_GPIO_28_MASK | MSS_GPIO_29_MASK | MSS_GPIO_30_MASK | MSS_GPIO_31_MASK);

    SystemCoreClockUpdate();

    MSS_UART_init(
        &g_mss_uart0,
        MSS_UART_460800_BAUD, /*MSS_UART_19200_BAUD,*/ /* MSS_UART_921600_BAUD, */
        MSS_UART_DATA_8_BITS | MSS_UART_NO_PARITY | MSS_UART_ONE_STOP_BIT
    );

    NVIC_SetPriority(DMA_IRQn, 5);
    PDMA_init();
    PDMA_set_priority_ratio(PDMA_ROUND_ROBIN);
}

void taskPrintTest(void *params) {
    uint32_t cnt = 0;
    while (1) {
        printf("TaskName: %s, cnt: %d\n", pcTaskGetTaskName(NULL), cnt++);
        vTaskDelay(pdMS_TO_TICKS(250));
        /* TODO look for why only "pr2" is scheduled when the delay is removed !!! */
    }
}

int main() {
    init();
    welcome();

    initLoggerTask();

    xTaskCreate(
        taskBlink, "blink", configMINIMAL_STACK_SIZE, NULL, 3, NULL);
    xTaskCreate(
        taskLogger, "logger", configMINIMAL_STACK_SIZE, NULL, 3, NULL);
    xTaskCreate(
        taskPrintTest, "pr0", configMINIMAL_STACK_SIZE, NULL, 3, NULL);
    xTaskCreate(
        taskPrintTest, "pr1", configMINIMAL_STACK_SIZE, NULL, 3, NULL);
    xTaskCreate(
        taskPrintTest, "pr2", configMINIMAL_STACK_SIZE, NULL, 3, NULL);
    vTaskStartScheduler();

    while (1);  // should never be reached
    return 0;
}