From d90daf0cb265911b2e9dc7d90c04d91d383e2162 Mon Sep 17 00:00:00 2001
From: Joel Bodenmann <joel@embedded.pro>
Date: Sun, 27 Nov 2016 17:08:49 +0100
Subject: [PATCH] Adding ADS7843 + STM32CubeF4HAL demo board file

---
 .../ginput/touch/ADS7843/stm32f4cube_hal.h    | 140 ++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 boards/addons/ginput/touch/ADS7843/stm32f4cube_hal.h

diff --git a/boards/addons/ginput/touch/ADS7843/stm32f4cube_hal.h b/boards/addons/ginput/touch/ADS7843/stm32f4cube_hal.h
new file mode 100644
index 00000000..6bce29e6
--- /dev/null
+++ b/boards/addons/ginput/touch/ADS7843/stm32f4cube_hal.h
@@ -0,0 +1,140 @@
+#include "stm32f4xx_hal.h"
+
+#ifndef _GINPUT_LLD_MOUSE_BOARD_H
+#define _GINPUT_LLD_MOUSE_BOARD_H
+
+// Resolution and Accuracy Settings
+#define GMOUSE_ADS7843_PEN_CALIBRATE_ERROR		8
+#define GMOUSE_ADS7843_PEN_CLICK_ERROR			6
+#define GMOUSE_ADS7843_PEN_MOVE_ERROR			4
+#define GMOUSE_ADS7843_FINGER_CALIBRATE_ERROR	14
+#define GMOUSE_ADS7843_FINGER_CLICK_ERROR		18
+#define GMOUSE_ADS7843_FINGER_MOVE_ERROR		14
+
+// How much extra data to allocate at the end of the GMouse structure for the board's use
+#define GMOUSE_ADS7843_BOARD_DATA_SIZE			0
+
+static SPI_HandleTypeDef _hspi;
+
+static bool_t init_board(GMouse* m, unsigned driverinstance)
+{
+  GPIO_InitTypeDef GPIO_InitStruct;
+
+  (void)m;
+  (void)driverinstance;
+
+  // Peripheral clocks
+  __HAL_RCC_GPIOA_CLK_ENABLE();
+  __HAL_RCC_GPIOB_CLK_ENABLE();
+  __HAL_RCC_GPIOC_CLK_ENABLE();
+  __HAL_RCC_SPI1_CLK_ENABLE();
+
+  // GPIO pins
+  {
+    // PA4 (chip select)
+    GPIO_InitStruct.Pin = GPIO_PIN_4;
+    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+    GPIO_InitStruct.Pull = GPIO_NOPULL;
+    GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
+    GPIO_InitStruct.Alternate = 0;
+    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+
+    // PA5 (SPI SCK)
+    GPIO_InitStruct.Pin = GPIO_PIN_5;
+    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
+    GPIO_InitStruct.Pull = GPIO_PULLUP;
+    GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
+    GPIO_InitStruct.Alternate = GPIO_AF5_SPI1;
+    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+
+    // PA6 (SPI MISO)
+    GPIO_InitStruct.Pin = GPIO_PIN_6;
+    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
+    GPIO_InitStruct.Pull = GPIO_PULLUP;
+    GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
+    GPIO_InitStruct.Alternate = GPIO_AF5_SPI1;
+    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+
+    // PA7 (SPI MOSI)
+    GPIO_InitStruct.Pin = GPIO_PIN_7;
+    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
+    GPIO_InitStruct.Pull = GPIO_PULLUP;
+    GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
+    GPIO_InitStruct.Alternate = GPIO_AF5_SPI1;
+    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+
+    // PB1 (busy)
+    GPIO_InitStruct.Pin = GPIO_PIN_1;
+    GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
+    GPIO_InitStruct.Pull = GPIO_NOPULL;
+    GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
+    GPIO_InitStruct.Alternate = 0;
+    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
+
+    // PC4 (pen IRQ)
+    GPIO_InitStruct.Pin = GPIO_PIN_4;
+    GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
+    GPIO_InitStruct.Pull = GPIO_NOPULL;
+    GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
+    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
+  }
+
+  // SPI
+  _hspi.Instance = SPI1;
+  _hspi.Init.Mode = SPI_MODE_MASTER;
+  _hspi.Init.Direction = SPI_DIRECTION_2LINES;
+  _hspi.Init.DataSize = SPI_DATASIZE_8BIT;
+  _hspi.Init.CLKPolarity = SPI_POLARITY_LOW;
+  _hspi.Init.CLKPhase = SPI_PHASE_1EDGE;
+  _hspi.Init.NSS = SPI_NSS_SOFT;
+  _hspi.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256;
+  _hspi.Init.FirstBit = SPI_FIRSTBIT_MSB;
+  _hspi.Init.TIMode = SPI_TIMODE_DISABLE;
+  _hspi.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
+  _hspi.Init.CRCPolynomial = 10;
+  if (HAL_SPI_Init(&_hspi) != HAL_OK) {
+    return FALSE;
+  }
+
+  return TRUE;
+}
+
+static GFXINLINE bool_t getpin_pressed(GMouse* m)
+{
+  (void)m;
+
+  if (HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_4) == GPIO_PIN_RESET)
+    return TRUE;
+
+  return FALSE;
+}
+
+static GFXINLINE void aquire_bus(GMouse* m)
+{
+  (void)m;
+
+  HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_RESET);
+}
+
+static GFXINLINE void release_bus(GMouse* m)
+{
+  (void)m;
+
+  HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET);
+}
+
+static GFXINLINE uint16_t read_value(GMouse* m, uint16_t reg)
+{
+  uint8_t txbuf[3] = {0, 0, 0};
+  uint8_t rxbuf[3] = {0, 0, 0};
+  uint16_t ret;
+
+  (void)m;
+
+  txbuf[0] = reg;
+  HAL_SPI_TransmitReceive(&_hspi, txbuf, rxbuf, 3, 1000);
+
+  return (rxbuf[1] << 5) | (rxbuf[2] >> 3);
+}
+
+#endif /* _GINPUT_LLD_MOUSE_BOARD_H */