136 lines
4.7 KiB
C
136 lines
4.7 KiB
C
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#include "stm32f7xx_hal.h"
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#include "ext_26pin.h"
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SPI_HandleTypeDef hspi2;
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//------------------------------------------------------------------------------
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//------------------------------------------------------------------------------
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int32_t Ext_Debug_Init (void) {
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GPIO_InitTypeDef GPIO_InitStruct;
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/* GPIO Ports Clock Enable */
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__HAL_RCC_GPIOF_CLK_ENABLE();
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/* Configure GPIO pin: PF9 (GPIO_DEBUG) */
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GPIO_InitStruct.Pin = GPIO_PIN_9;
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GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
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return 0;
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}
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//------------------------------------------------------------------------------
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//------------------------------------------------------------------------------
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int32_t Ext_FreqGen_Init (void)
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{
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GPIO_InitTypeDef GPIO_InitStruct;
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/* GPIO Ports Clock Enable */
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__HAL_RCC_GPIOF_CLK_ENABLE();
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__HAL_RCC_GPIOI_CLK_ENABLE();
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__HAL_RCC_GPIOB_CLK_ENABLE();
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/*Configure GPIO pin Output Level */
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HAL_GPIO_WritePin(nCS_FREQ_GEN_GPIO_Port, nCS_FREQ_GEN_Pin, GPIO_PIN_SET);
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/*Configure GPIO pin : nCS_FREQ_GEN_Pin */
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GPIO_InitStruct.Pin = nCS_FREQ_GEN_Pin;
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GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
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HAL_GPIO_Init(nCS_FREQ_GEN_GPIO_Port, &GPIO_InitStruct);
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__HAL_RCC_SPI2_CLK_ENABLE();
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/**SPI2 GPIO Configuration
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PI1 ------> SPI2_SCK
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PB15 ------> SPI2_MOSI
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*/
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GPIO_InitStruct.Pin = GPIO_PIN_1;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
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GPIO_InitStruct.Alternate = GPIO_AF5_SPI2;
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HAL_GPIO_Init(GPIOI, &GPIO_InitStruct);
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GPIO_InitStruct.Pin = GPIO_PIN_15;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
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GPIO_InitStruct.Alternate = GPIO_AF5_SPI2;
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HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
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/* SPI2 parameter configuration*/
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hspi2.Instance = SPI2;
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hspi2.Init.Mode = SPI_MODE_MASTER;
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hspi2.Init.Direction = SPI_DIRECTION_2LINES;
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hspi2.Init.DataSize = SPI_DATASIZE_8BIT;
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hspi2.Init.CLKPolarity = SPI_POLARITY_HIGH;
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hspi2.Init.CLKPhase = SPI_PHASE_1EDGE;
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hspi2.Init.NSS = SPI_NSS_SOFT;
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hspi2.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_64;
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hspi2.Init.FirstBit = SPI_FIRSTBIT_MSB;
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hspi2.Init.TIMode = SPI_TIMODE_DISABLE;
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hspi2.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
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hspi2.Init.CRCPolynomial = 7;
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hspi2.Init.CRCLength = SPI_CRC_LENGTH_DATASIZE;
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hspi2.Init.NSSPMode = SPI_NSS_PULSE_DISABLE;
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if (HAL_SPI_Init(&hspi2) != HAL_OK)
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return -1;
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Ext_FreqGen_Set(20,SQUARE);
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Ext_FreqGen_Set(20,SQUARE);
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return 0;
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}
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//------------------------------------------------------------------------------
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//------------------------------------------------------------------------------
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void Ext_FreqGen_Set(uint32_t frequency,f_mode mode)
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{
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uint8_t data[2];
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float calcDivisor;
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uint32_t divisorInt;
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calcDivisor = ((float)frequency * 268435456L) / 16000000L;
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divisorInt = (uint32_t)calcDivisor + 1;
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//----------------------------------------------------------------------------
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// reset generator
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data[0] = 0x21;
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data[1] = 0x00;
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HAL_GPIO_WritePin(nCS_FREQ_GEN_GPIO_Port, nCS_FREQ_GEN_Pin, GPIO_PIN_RESET);
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HAL_SPI_Transmit(&hspi2,data,2,10);
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HAL_GPIO_WritePin(nCS_FREQ_GEN_GPIO_Port, nCS_FREQ_GEN_Pin, GPIO_PIN_SET);
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//----------------------------------------------------------------------------
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// set frequency LSB (14 bits)
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data[0] = ((divisorInt & 0x3FFF) | 0x4000) >> 8;
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data[1] = ((divisorInt & 0x3FFF) | 0x4000) >> 0;
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HAL_GPIO_WritePin(nCS_FREQ_GEN_GPIO_Port, nCS_FREQ_GEN_Pin, GPIO_PIN_RESET);
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HAL_SPI_Transmit(&hspi2,data,2,10);
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HAL_GPIO_WritePin(nCS_FREQ_GEN_GPIO_Port, nCS_FREQ_GEN_Pin, GPIO_PIN_SET);
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//----------------------------------------------------------------------------
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// set frequency MSB (14 bits)
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data[0] = (((divisorInt>>14) & 0x3FFF) | 0x4000) >> 8;
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data[1] = (((divisorInt>>14) & 0x3FFF) | 0x4000) >> 0;
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HAL_GPIO_WritePin(nCS_FREQ_GEN_GPIO_Port, nCS_FREQ_GEN_Pin, GPIO_PIN_RESET);
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HAL_SPI_Transmit(&hspi2,data,2,10);
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HAL_GPIO_WritePin(nCS_FREQ_GEN_GPIO_Port, nCS_FREQ_GEN_Pin, GPIO_PIN_SET);
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//----------------------------------------------------------------------------
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// set output signal
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data[0] = 0x20; // unreset
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switch(mode)
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{
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case SINUS:
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data[1] = 0x00;
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break;
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case TRIANGLE:
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data[1] = 0x02;
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break;
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case SQUARE:
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data[1] = 0x28;
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break;
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}
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HAL_GPIO_WritePin(nCS_FREQ_GEN_GPIO_Port, nCS_FREQ_GEN_Pin, GPIO_PIN_RESET);
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HAL_SPI_Transmit(&hspi2,data,2,10);
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HAL_GPIO_WritePin(nCS_FREQ_GEN_GPIO_Port, nCS_FREQ_GEN_Pin, GPIO_PIN_SET);
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}
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