1 | /* Includes ------------------------------------------------------------------*/
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2 | #include "stm32f10x.h"
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3 |
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4 |
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5 |
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6 | /* Private typedef -----------------------------------------------------------*/
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7 |
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8 | /* Private define ------------------------------------------------------------*/
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9 | #define BufferSize 32
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10 |
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11 | /* Private macro -------------------------------------------------------------*/
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12 | /* Private variables ---------------------------------------------------------*/
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13 | SPI_InitTypeDef SPI_InitStructure;
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14 | DMA_InitTypeDef DMA_InitStructure;
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15 | GPIO_InitTypeDef GPIO_InitStructure;
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16 |
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17 |
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18 | /* Private function prototypes -----------------------------------------------*/
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19 | void RCC_Configuration(void);
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20 | void GPIO_Configuration(void);
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21 |
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22 | /* Private functions ---------------------------------------------------------*/
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23 |
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24 | /**
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25 | * @brief Main program
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26 | * @param None
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27 | * @retval None
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28 | */
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29 | int main(void)
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30 | {
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31 |
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32 |
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33 | /* System clocks configuration ---------------------------------------------*/
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34 | RCC_Configuration();
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35 |
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36 | /* GPIO configuration ------------------------------------------------------*/
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37 | GPIO_Configuration();
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38 |
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39 |
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40 |
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41 | // SPI_MASTER configuration ------------------------------------------------------
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42 | SPI_InitStructure.SPI_Direction = SPI_Direction_1Line_Tx;
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43 | SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
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44 | SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;
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45 | SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
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46 | SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
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47 | SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
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48 | SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
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49 | SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
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50 | SPI_InitStructure.SPI_CRCPolynomial = 7;
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51 | SPI_Init(SPI1, &SPI_InitStructure);
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52 |
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53 | // Take NSS line high by default
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54 | GPIO_SetBits(GPIOA, GPIO_Pin_4);
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55 |
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56 |
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57 |
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58 | /* Enable SPI_MASTER */
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59 | SPI_Cmd(SPI1, ENABLE);
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60 |
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61 |
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62 | while (1)
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63 | {
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64 |
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65 |
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66 |
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67 | GPIO_ResetBits(GPIOA, GPIO_Pin_4);
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68 |
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69 | // SPI_I2S_SendData(SPI1, 0b1100000000000000);
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70 | SPI_I2S_SendData(SPI1, 0b1011000000000000); //Clear DAC Output to zero
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71 |
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72 |
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73 | while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET)
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74 | {}
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75 |
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76 |
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77 | GPIO_SetBits(GPIOA, GPIO_Pin_4);
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78 |
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79 |
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80 | }
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81 |
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82 |
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83 | }
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84 |
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85 |
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86 | void RCC_Configuration(void)
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87 | {
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88 | /* PCLK2 = HCLK/2 */
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89 | RCC_PCLK2Config(RCC_HCLK_Div2);
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90 |
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91 | /* Enable peripheral clocks --------------------------------------------------*/
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92 |
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93 |
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94 | /* Enable SPI_MASTER clock and GPIO clock for SPI_MASTER and SPI_SLAVE */
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95 |
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96 | RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1 ,ENABLE);
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97 | RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA ,ENABLE);
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98 |
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99 | }
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100 |
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101 | void GPIO_Configuration(void)
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102 | {
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103 | GPIO_InitTypeDef GPIO_InitStructure;
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104 |
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105 |
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106 |
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107 | /* Configure SPI_MASTER pins: NSS, SCK and MOSI */
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108 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_5 ;
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109 | GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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110 | GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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111 | GPIO_Init(GPIOA, &GPIO_InitStructure);
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112 |
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113 | GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 ;
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114 | GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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115 | GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
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116 | GPIO_Init(GPIOA, &GPIO_InitStructure);
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117 |
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118 |
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119 | }
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