5 示例代碼

對從 GUI 生成的映像文件進行了輕微修改，如以下代碼所示。

#include "ti_msp_dl_config.h"
#include "lrb.h"

const uint8_t tps25751_lowRegion_i2c_array[SIZEOFLRB] = {
0x01, 0x00, 0xe0, 0xac, 0xfe, 0xff, 0xff, 0xff, 0x80, 0x06, 0x00, 0x00, 0x00, 0x26, 0x00, 0x00, 
0x71, 0x3e, 0x9c, 0xb8, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
...
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; 

文件 lrb.h 如以下代碼所示，用于提供上下文。

#define SIZEOFLRB  0x2C80   // 11392
/* Maximum size of TX packet, MCU 0xFFF */
#define I2C_TX_MAX_PACKET_SIZE
/* SIZEOFLRB/I2C_TX_MAX_PACKET_SIZE +1 */
#define LRB_NUMBER_OF_PACKETS  (0x0003) 
/* SIZEOFLRB % I2C_TX_MAX_PACKET_SIZE */
#define LRB_REMAINDER         (0x0C82)
extern const uint8_t tps25751_lowRegion_i2c_array[SIZEOFLRB];

以下示例代碼基于 MSPM0C110x 驅(qū)動程序庫⁽¹⁾和節(jié) 4.1中的步驟。

    
    /*
     *  1. Wait for Ready for Patch interrupt
     */    
    debounce = 1;
    /* Skip glitch at boot */
    while(debounce)
    {
        while(DL_GPIO_readPins(
                GPIO_SWITCHES_PORT, GPIO_SWITCHES_USER_SWITCH_1_PIN)); 
        delay_cycles(DELAY_500us);
        if(!DL_GPIO_readPins(
                GPIO_SWITCHES_PORT, GPIO_SWITCHES_USER_SWITCH_1_PIN))
        {
             debounce = 0;
        }
    }    
    /*
     *  2. Mode == PTCH
     */    
    readRegister(MODE_REGISTER, MODE_BYTE_CNT, gRxPacket);
    if(gRxPacket[1] != 0x50)
    { 
        delay_cycles(DELAY_10ms);
        readRegister(MODE_REGISTER, MODE_BYTE_CNT, gRxPacket);
    }
    /*
     *  3a. Configure I2Ct_IRQ for CMD1 Complete
     */                                                */
    gTxPacket = (uint8_t*)maskIntReg;
    writeRegister(INT_BYTE_CNT, (uint8_t*)gTxPacket);
    waitingForPD = 1;
    while(waitingForPD)
    {
        /*
         *  3b. Clear Interrupts
         */ 
        gTxPacket = (uint8_t*)clrIntReg;
        writeRegister(INT_BYTE_CNT, (uint8_t*)gTxPacket);
        //  Wait for interrupt to clear
        while(DL_GPIO_readPins(GPIO_SWITCHES_PORT, GPIO_SWITCHES_USER_SWITCH_1_PIN)==0);
        waitingForGoodData = 1;
        while(waitingForGoodData)
        {
            /*
             *  4. Send PBMs Data
             */           
            gTxPacket = (uint8_t*)PBMsData;
            writeRegister(DATA_BYTE_CNT, gTxPacket);
            delay_cycles(DELAY_500us);
            /* 
             * 5. Data Good
             */
            readRegister(DATA_REG, (DATA_BYTE_CNT-1), gRxPacket);
            if(gRxPacket[1] == 0x80)
            {
                waitingForGoodData = 0;
            }
        }
        /*
         *  6. Send PBMs to CMD1
         */
        gTxPacket = (uint8_t*)PBMsCmd;
        writeRegister(CMD_BYTE_CNT, gTxPacket);
        /*
         *  7. Wait for I2Ct_IRQ
         */
        while(DL_GPIO_readPins(
                    GPIO_SWITCHES_PORT, GPIO_SWITCHES_USER_SWITCH_1_PIN));
        /*
         *  8. CMD1 Clear
         */
        readRegister(CMD_REG, (CMD_BYTE_CNT-1), gRxPacket);
        /*
         *  9. DATA1 Clear
         */
        readRegister(DATA_REG, (DATA_BYTE_CNT-1), gRxPacket);
        if(gRxPacket[1] == 0x0)
        {
            waitingForPD = 0;
        } 
    }
    /*
     *  10. Burst Data
     */
    ii = LRB_NUMBER_OF_PACKETS;
    while(ii)
    {
        if(ii == 1)
        {
            gTxLen = LRB_REMAINDER;
        }
        else 
        {
            gTxLen = I2C_TX_MAX_PACKET_SIZE;        
        }
        /* The FIFO is 8-bytes deep, and this function returns number of bytes written to FIFO */
        gTxPacket = (uint8_t*)&tps25751_lowRegion_i2c_array[(LRB_NUMBER_OF_PACKETS-ii)*I2C_TX_MAX_PACKET_SIZE];
        ii = ii-1;
        gTxCount = DL_I2C_fillControllerTXFIFO(I2C_INST, gTxPacket, gTxLen);
        DL_I2C_enableInterrupt(
                I2C_INST, DL_I2C_INTERRUPT_CONTROLLER_TXFIFO_TRIGGER);
        gI2cControllerStatus = I2C_STATUS_TX_STARTED;
        while (!(
            DL_I2C_getControllerStatus(I2C_INST) & DL_I2C_CONTROLLER_STATUS_IDLE))
            ;
        DL_I2C_startControllerTransfer(
            I2C_INST, I2C_TGT_BURST_ADDRESS, DL_I2C_CONTROLLER_DIRECTION_TX, gTxLen);
        while ((gI2cControllerStatus != I2C_STATUS_TX_COMPLETE) &&
            (gI2cControllerStatus != I2C_STATUS_ERROR)) {
            __WFE();
        }
        while (DL_I2C_getControllerStatus(I2C_INST) &
            DL_I2C_CONTROLLER_STATUS_BUSY_BUS)
            ;
        /* Trap if there was an error */
        if (DL_I2C_getControllerStatus(I2C_INST) &
            DL_I2C_CONTROLLER_STATUS_ERROR) {
            __BKPT(0);
        }
        while(!(
            DL_I2C_getControllerStatus(I2C_INST) & DL_I2C_CONTROLLER_STATUS_IDLE))
            ;
        delay_cycles(DELAY_500us);
    }
    /*
     *  11. Clear Interrupts
     */
    gTxPacket = (uint8_t*)clrIntReg;
    writeRegister(INT_BYTE_CNT, (uint8_t*)gTxPacket);
    //  Wait for interrupt to clear
    while(DL_GPIO_readPins(
        GPIO_SWITCHES_PORT, GPIO_SWITCHES_USER_SWITCH_1_PIN)==0)
        ;
    /*
     *  12. Send PBMc to CMD1 Register
     */
    gTxPacket = (uint8_t*)PBMcCmd;
    writeRegister(CMD_BYTE_CNT,gTxPacket);
    /*
     *  13. I2Ct_IRQ == Low, CMD1 complete
     */
    while(DL_GPIO_readPins(
        GPIO_SWITCHES_PORT, GPIO_SWITCHES_USER_SWITCH_1_PIN));
    /*
     *  14. Read CMD1
     */
    readRegister(CMD_REG, (CMD_BYTE_CNT-1), gRxPacket);
    /*
     *  15. Delay 20ms
     */
    delay_cycles(DELAY_20ms);
    /*
     *  16. Read Data1 
     */
    readRegister(DATA_REG, 0x28, gRxPacket);
    /*
     *  17. MODE === APP 
     */          
    waitingForPD = 1;           
    while(waitingForPD)
    {
        readRegister(MODE_REGISTER, MODE_BYTE_CNT, gRxPacket);
        if(gRxPacket[1] == 0x41)
        {
            waitingForPD = 0;
        }
        else 
        {
            delay_cycles(DELAY_10ms);
        }
    }