141 lines
3.7 KiB
C
141 lines
3.7 KiB
C
#include "stm32f4xx_hal.h"
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#ifndef _GINPUT_LLD_MOUSE_BOARD_H
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#define _GINPUT_LLD_MOUSE_BOARD_H
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// Resolution and Accuracy Settings
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#define GMOUSE_ADS7843_PEN_CALIBRATE_ERROR 8
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#define GMOUSE_ADS7843_PEN_CLICK_ERROR 6
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#define GMOUSE_ADS7843_PEN_MOVE_ERROR 4
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#define GMOUSE_ADS7843_FINGER_CALIBRATE_ERROR 14
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#define GMOUSE_ADS7843_FINGER_CLICK_ERROR 18
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#define GMOUSE_ADS7843_FINGER_MOVE_ERROR 14
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// How much extra data to allocate at the end of the GMouse structure for the board's use
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#define GMOUSE_ADS7843_BOARD_DATA_SIZE 0
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static SPI_HandleTypeDef _hspi;
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static gBool init_board(GMouse* m, unsigned driverinstance)
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{
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GPIO_InitTypeDef GPIO_InitStruct;
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(void)m;
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(void)driverinstance;
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// Peripheral clocks
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__HAL_RCC_GPIOA_CLK_ENABLE();
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__HAL_RCC_GPIOB_CLK_ENABLE();
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__HAL_RCC_GPIOC_CLK_ENABLE();
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__HAL_RCC_SPI1_CLK_ENABLE();
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// GPIO pins
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{
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// PA4 (chip select)
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GPIO_InitStruct.Pin = GPIO_PIN_4;
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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_HIGH;
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GPIO_InitStruct.Alternate = 0;
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HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
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// PA5 (SPI SCK)
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GPIO_InitStruct.Pin = GPIO_PIN_5;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStruct.Pull = GPIO_PULLUP;
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GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
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GPIO_InitStruct.Alternate = GPIO_AF5_SPI1;
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HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
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// PA6 (SPI MISO)
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GPIO_InitStruct.Pin = GPIO_PIN_6;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStruct.Pull = GPIO_PULLUP;
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GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
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GPIO_InitStruct.Alternate = GPIO_AF5_SPI1;
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HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
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// PA7 (SPI MOSI)
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GPIO_InitStruct.Pin = GPIO_PIN_7;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStruct.Pull = GPIO_PULLUP;
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GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
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GPIO_InitStruct.Alternate = GPIO_AF5_SPI1;
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HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
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// PB1 (busy)
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GPIO_InitStruct.Pin = GPIO_PIN_1;
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GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
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GPIO_InitStruct.Alternate = 0;
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HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
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// PC4 (pen IRQ)
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GPIO_InitStruct.Pin = GPIO_PIN_4;
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GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
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GPIO_InitStruct.Pull = GPIO_NOPULL;
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GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
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HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
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}
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// SPI
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_hspi.Instance = SPI1;
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_hspi.Init.Mode = SPI_MODE_MASTER;
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_hspi.Init.Direction = SPI_DIRECTION_2LINES;
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_hspi.Init.DataSize = SPI_DATASIZE_8BIT;
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_hspi.Init.CLKPolarity = SPI_POLARITY_LOW;
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_hspi.Init.CLKPhase = SPI_PHASE_1EDGE;
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_hspi.Init.NSS = SPI_NSS_SOFT;
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_hspi.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256;
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_hspi.Init.FirstBit = SPI_FIRSTBIT_MSB;
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_hspi.Init.TIMode = SPI_TIMODE_DISABLE;
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_hspi.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
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_hspi.Init.CRCPolynomial = 10;
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if (HAL_SPI_Init(&_hspi) != HAL_OK) {
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return gFalse;
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}
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return gTrue;
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}
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static GFXINLINE gBool getpin_pressed(GMouse* m)
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{
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(void)m;
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if (HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_4) == GPIO_PIN_RESET)
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return gTrue;
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return gFalse;
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}
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static GFXINLINE void aquire_bus(GMouse* m)
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{
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(void)m;
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HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_RESET);
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}
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static GFXINLINE void release_bus(GMouse* m)
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{
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(void)m;
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HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET);
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}
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static GFXINLINE gU16 read_value(GMouse* m, gU16 reg)
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{
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gU8 txbuf[3] = {0, 0, 0};
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gU8 rxbuf[3] = {0, 0, 0};
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gU16 ret;
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(void)m;
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txbuf[0] = reg;
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HAL_SPI_TransmitReceive(&_hspi, txbuf, rxbuf, 3, 1000);
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return (rxbuf[1] << 5) | (rxbuf[2] >> 3);
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}
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#endif /* _GINPUT_LLD_MOUSE_BOARD_H */
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