RM46 Code

#include "supervisor.h"
#include "obc_sci_io.h"
#include "obc_i2c_io.h"

#include <FreeRTOS.h>
#include <os_task.h>

#include <sys_common.h>
#include "system.h"
#include <stdio.h>
#include <gio.h>
#include <sci.h>
#include <i2c.h>

#include "spi.h"

#define SPI_REG spiREG3

#define TEST_REG 0x00
#define VERSION_REG 0x40 // RM46: 96, Arduino: 128

spiDAT1_t spi_config = {
    .CS_HOLD = FALSE,
    .WDEL = TRUE,
    .DFSEL = SPI_FMT_1,
    .CSNR = SPI_CS_1
};

void write_reg(uint16_t addr, uint16_t data) {
    spiPORT3->DCLR = (1 << 1);
    addr = addr | 0x80;
    spiTransmitData(SPI_REG, &spi_config, 1, &addr);
    spiTransmitData(SPI_REG, &spi_config, 1, &data);
    spiPORT3->DSET = (1 << 1);
}

void read_reg(uint16_t addr, uint8_t *rx_data) {
    spiPORT3->DCLR = (1 << 1);
    addr = addr & 0x7F;
    spiTransmitData(SPI_REG, &spi_config, 1, &addr);
    spiReceiveData(SPI_REG, &spi_config, 1, (uint16_t *)rx_data);
    spiPORT3->DSET = (1 << 1);
}

int main(void) {

    // Run hardware initialization code (TODO: refactor all this into one function call)
    gioInit();
    sciInit();
    i2cInit();

    // Initialize bus mutexes
    initSciMutex();
    initI2CMutex();

    spiInit();

    uint16_t tx_data = 0;
    uint8_t rx_data = 7;

    //Reset the CPLD
    write_reg(0x07, 0x80);
    // Simple delay.
    for (int i = 0; i < 10000000; i++) {
        // Do nothing.
    }
    write_reg(0x07, 0x00);
    // Simple delay.
    for (int i = 0; i < 10000000; i++) {
        // Do nothing.
    }

    while(1) {

        // Toggle the LED.
        gioToggleBit(gioPORTB, 1);

        write_reg(TEST_REG, tx_data);
        read_reg(0x41, &rx_data);

        char buffer[50];
        uint8_t len = sprintf(buffer, "\r\nrx_data: %d", rx_data);
        printTextSci(scilinREG, (unsigned char *)buffer, len);

        if(++tx_data >= 6) {
            tx_data = 0;
        }

        // Simple delay.
        for (int i = 0; i < 10000000; i++) {
            // Do nothing.
        }
    }

}