Changeset - ea7b474ebba7
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Ethan Zonca - 10 years ago 2014-08-23 20:33:43
ez@ethanzonca.com
Got some stuff coming out of the TC chip
1 file changed with 78 insertions and 25 deletions:
main.c
78
25
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main.c
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@@ -26,13 +26,13 @@ extern __IO  uint32_t Receive_length ;
 
extern __IO  uint32_t length ;
 
uint8_t Send_Buffer[64];
 
uint32_t packet_sent=1;
 
uint32_t packet_receive=1;
 
 
 
char* itoa(int i, char b[]){
 
char* itoa(int32_t i, char b[]){
 
    char const digit[] = "0123456789";
 
    char* p = b;
 
    if(i<0){
 
        *p++ = '-';
 
        i *= -1;
 
    }
 
@@ -46,12 +46,19 @@ char* itoa(int i, char b[]){
 
        *--p = digit[i%10];
 
        i = i/10;
 
    }while(i);
 
    return b;
 
}
 
 
 
int32_t round(double x) {
 
    if (x >= 0)
 
        return (long) (x+0.5);
 
    return (long) (x-0.5);
 
}
 
 
static __IO uint32_t TimingDelay;
 
 
// Move to header file
 
void init_gpio();
 
void init_spi();
 
void process();
 
@@ -115,15 +122,17 @@ int main(void)
 
        //uint8_t sw_left = GPIO_ReadInputDataBit(SW_LEFT);
 
        //uint8_t sw_right = GPIO_ReadInputDataBit(SW_RIGHT);
 
 
        if(!sw_btn) {
 
            GPIO_ToggleBits(LED_STAT);
 
            if(!toggle) {
 
                GPIO_SetBits(GPIOB, GPIO_Pin_13);
 
                toggle = ! toggle;
 
            }
 
            else  {
 
                GPIO_ResetBits(GPIOB, GPIO_Pin_13);
 
                toggle = ! toggle;
 
            }
 
        }
 
 
        GPIO_SetBits(LED_POWER);
 
        Delay(50);
 
@@ -140,28 +149,72 @@ int32_t d = 1;
 
 
// Process things
 
void process()
 
{
 
    // Assert CS
 
    GPIO_ResetBits(MAX_CS);
 
    Delay(50);
 
    Delay(1);
 
 
    // This may not clock at all... might need to send 16 bits first
 
    SPI_I2S_SendData(SPI2, 0xAA); // send dummy data
 
    SPI_I2S_SendData(SPI2, 0xAA); // send dummy data
 
    uint16_t retval = SPI_I2S_ReceiveData(SPI2);
 
    uint16_t temp1 = SPI_I2S_ReceiveData(SPI2);
 
//    SPI_I2S_SendData(SPI2, 0xAA); // send dummy data
 
//    SPI_I2S_SendData(SPI2, 0xAA); // send dummy data
 
    uint16_t temp2 = 0;//SPI_I2S_ReceiveData(SPI2);
 
 
    // Deassert CS
 
    Delay(1);
 
    GPIO_SetBits(MAX_CS);
 
 
    int32_t temp = (temp1 << 16) | temp2;
 
 
    //////////////////////////
 
    // Calc internal temp   //
 
    //////////////////////////
 
/*    temp = temp >> 4; // Drop last 4 bits, no need for them
 
    float internal_temp = temp & 0x7FF // Lower 11bits are internal temp
 
 
    // Check internal temp sign
 
    if(temp & 0x800) {
 
        // Convert to negative value by extending sign and casting to signed type.
 
        int16_t tmp = 0xF800 | (temp & 0x7FF);
 
        internal_temp = tmp;
 
    }
 
    internal_temp *= 0.0625; // LSB = 0.0625 degrees
 
    // Now we have a good internal temp!
 
*/
 
    //////////////////////////
 
    // Calc external temp   //
 
    //////////////////////////
 
    if(temp & 0x7) {
 
        // Something is wrong...
 
        ssd1306_DrawString("!TempCOMMS", 3, 35);
 
    }
 
 
    if(temp & 0x80000000) {
 
        // Negative value, drop the lower 18 bits and explicitly extend sign bits
 
        temp = 0xFFFFC000 | ((temp >> 18) & 0x00003FFFF);
 
    }
 
    else {
 
        // Positive value, just drop lower 18
 
        temp >>= 18;
 
    }
 
 
    double temp_centigrade = temp;
 
 
 
    if(temp > 0) {
 
        GPIO_SetBits(LED_STAT);
 
    }
 
    char tempstr[9];
 
    itoa(retval, tempstr);
 
    itoa(temp, tempstr);
 
    ssd1306_DrawString("Temp: ", 1, 40);
 
    ssd1306_DrawString(tempstr, 1, 70);
 
 
 
    // Deassert CS
 
    GPIO_SetBits(MAX_CS);
 
 
/*
 
    if((!retval || (temp & 0x2) != 0))
 
    {
 
        ssd1306_DrawString("!TempCOMMS", 3, 35);
 
        //return; // Comms error - this is happening right now
 
    }
 
 
@@ -169,13 +222,13 @@ void process()
 
    {
 
        ssd1306_DrawString("!OpenThermocouple", 3, 40);
 
        //return; // Open thermocouple
 
    }
 
 
    temp = (temp & 0x7FF8) >> 5;
 
 
*/
 
 
    // TODO: Add calibration offset (linear)
 
 
 
    // Perform PID calculations
 
 
@@ -387,32 +440,35 @@ void TimingDelay_Decrement(void)
 
 
void init_spi(void)
 
{
 
    SPI_InitTypeDef  SPI_InitStructure;
 
 
    // OLED IC
 
    SPI_Cmd(SPI1, DISABLE);
 
    SPI_InitStructure.SPI_Direction = SPI_Direction_1Line_Tx;
 
    SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
 
    SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
 
    SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
 
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
 
    SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
 
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
 
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
 
    SPI_InitStructure.SPI_CRCPolynomial = 7;
 
    SPI_Init(SPI1, &SPI_InitStructure);
 
    SPI_Cmd(SPI1, ENABLE);           /* Enable the SPI  */
 
 
 
    // MAX IC
 
    SPI_InitStructure.SPI_Direction = SPI_Direction_1Line_Rx;
 
    SPI_Cmd(SPI2, DISABLE);
 
    SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
 
    SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
 
    SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b; // Andysworkshop
 
    SPI_InitStructure.SPI_CPOL = SPI_CPOL_High; // From andysworkshop
 
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge; // same
 
    SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; // From andysworkshop
 
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; // same
 
    SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
 
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_128;
 
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;
 
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
 
    SPI_InitStructure.SPI_CRCPolynomial = 7;
 
    SPI_Init(SPI2, &SPI_InitStructure);
 
    SPI_Cmd(SPI2, ENABLE);           /* Enable the SPI */
 
}
 
 
@@ -489,38 +545,35 @@ void init_gpio(void) {
 
  PB15   ------> SPI2_MOSI
 
  */
 
 
  /*Enable or disable the AHB peripheral clock */
 
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
 
 
 
// SPI PINSSS
 
 
  /*Configure GPIO pin : PB, MOSI, SCK */
 
  GPIO_InitStruct.GPIO_Pin = GPIO_Pin_13|GPIO_Pin_15;
 
  GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
 
  GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
 
  GPIO_InitStruct.GPIO_Speed = GPIO_Speed_10MHz;
 
  GPIO_Init(GPIOB, &GPIO_InitStruct);
 
 
 GPIO_InitTypeDef GPIO_InitStruct2;
 
// MISO
 
  GPIO_InitStruct.GPIO_Pin = GPIO_Pin_14;
 
  GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN;
 
  GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
 
  GPIO_InitStruct.GPIO_Speed = GPIO_Speed_10MHz;
 
  GPIO_Init(GPIOB, &GPIO_InitStruct);
 
  GPIO_InitStruct2.GPIO_Pin = GPIO_Pin_14;
 
  GPIO_InitStruct2.GPIO_Mode = GPIO_Mode_AF;
 
  GPIO_InitStruct2.GPIO_PuPd = GPIO_PuPd_NOPULL;
 
  GPIO_InitStruct2.GPIO_Speed = GPIO_Speed_10MHz;
 
  GPIO_Init(GPIOB, &GPIO_InitStruct2);
 
 
 
  /*Configure GPIO pin alternate function */
 
  //Configure GPIO pin alternate function
 
  GPIO_PinAFConfig(GPIOB, GPIO_PinSource13, GPIO_AF_SPI2);
 
  GPIO_PinAFConfig(GPIOB, GPIO_PinSource14, GPIO_AF_SPI2);
 
  GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_SPI2);
 
 
  /*Configure GPIO pin alternate function */
 
  GPIO_PinAFConfig(GPIOB, GPIO_PinSource14, GPIO_AF_SPI2);
 
 
  /*Configure GPIO pin alternate function */
 
  GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_SPI2);
 
 
  /** USB GPIO Configuration
 
  PA11   ------> USB_DM
 
  PA12   ------> USB_DP
 
  */
 
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