Added support for ErgoDox with STM32 Microcontroller

drivers/arm/i2c_master.c

@@ -32,6 +32,17 @@
 
 static uint8_t i2c_address;
 
+// ChibiOS uses two initialization structure for v1 and v2/v3 i2c APIs.
+// The F1 series uses the v1 api, which have to initialized this way.
+#ifdef STM32F103xB
+static const I2CConfig i2cconfig = {
+  OPMODE_I2C,
+  400000,
+  FAST_DUTY_CYCLE_2,
+};
+#else
+// This configures the I2C clock to 400khz assuming a 72Mhz clock
+// For more info : https://www.st.com/en/embedded-software/stsw-stm32126.html
 static const I2CConfig i2cconfig = {
 #ifdef USE_I2CV1
     I2C1_OPMODE,
@@ -41,6 +52,7 @@ static const I2CConfig i2cconfig = {
     STM32_TIMINGR_PRESC(I2C1_TIMINGR_PRESC) | STM32_TIMINGR_SCLDEL(I2C1_TIMINGR_SCLDEL) | STM32_TIMINGR_SDADEL(I2C1_TIMINGR_SDADEL) | STM32_TIMINGR_SCLH(I2C1_TIMINGR_SCLH) | STM32_TIMINGR_SCLL(I2C1_TIMINGR_SCLL), 0, 0
 #endif
 };
+#endif
 
 static i2c_status_t chibios_to_qmk(const msg_t* status) {
     switch (*status) {
@@ -60,16 +72,13 @@ __attribute__((weak)) void i2c_init(void) {
     palSetPadMode(I2C1_SDA_BANK, I2C1_SDA, PAL_MODE_INPUT);
 
     chThdSleepMilliseconds(10);
-
 #ifdef USE_I2CV1
     palSetPadMode(I2C1_SCL_BANK, I2C1_SCL, PAL_MODE_STM32_ALTERNATE_OPENDRAIN);
     palSetPadMode(I2C1_SDA_BANK, I2C1_SDA, PAL_MODE_STM32_ALTERNATE_OPENDRAIN);
 #else
     palSetPadMode(I2C1_SCL_BANK, I2C1_SCL, PAL_MODE_ALTERNATE(I2C1_SCL_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN);
     palSetPadMode(I2C1_SDA_BANK, I2C1_SDA, PAL_MODE_ALTERNATE(I2C1_SDA_PAL_MODE) | PAL_STM32_OTYPE_OPENDRAIN);
 #endif
-
-    // i2cInit(); //This is invoked by halInit() so no need to redo it.
 }
 
 i2c_status_t i2c_start(uint8_t address) {

keyboards/ergodox_stm32/boards/ERGODOX_STM32_BOARD/board.c

@@ -0,0 +1,51 @@
+/*
+    ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+#include "hal.h"
+
+/**
+ * @brief   PAL setup.
+ * @details Digital I/O ports static configuration as defined in @p board.h.
+ *          This variable is used by the HAL when initializing the PAL driver.
+ */
+#if HAL_USE_PAL || defined(__DOXYGEN__)
+const PALConfig pal_default_config =
+{
+  {VAL_GPIOAODR, VAL_GPIOACRL, VAL_GPIOACRH},
+  {VAL_GPIOBODR, VAL_GPIOBCRL, VAL_GPIOBCRH},
+  {VAL_GPIOCODR, VAL_GPIOCCRL, VAL_GPIOCCRH},
+  {VAL_GPIODODR, VAL_GPIODCRL, VAL_GPIODCRH},
+  {VAL_GPIOEODR, VAL_GPIOECRL, VAL_GPIOECRH},
+};
+#endif
+
+/*
+ * Early initialization code.
+ * This initialization must be performed just after stack setup and before
+ * any other initialization.
+ */
+void __early_init(void) {
+
+  stm32_clock_init();
+}
+
+/*
+ * Board-specific initialization code.
+ */
+void boardInit(void) {
+	AFIO->MAPR |= AFIO_MAPR_SWJ_CFG_JTAGDISABLE;
+
+}

keyboards/ergodox_stm32/boards/ERGODOX_STM32_BOARD/board.h

@@ -0,0 +1,142 @@
+/*
+    ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+#ifndef _BOARD_H_
+#define _BOARD_H_
+
+/*
+ * Board identifier.
+ */
+#define BOARD_JM60
+#define BOARD_NAME              "ErgoDox STM32 Keyboard"
+
+/*
+ * Board frequencies.
+ */
+#define STM32_LSECLK            0
+#define STM32_HSECLK            8000000
+
+/*
+ * MCU type, supported types are defined in ./os/hal/platforms/hal_lld.h.
+ *
+ * Only xB (128KB Flash) is defined, but it's identical to the
+ * x8 version (64KB Flash) except for the Flash region size in the
+ * linker script. For x8 parts use xB here and change to the x8 linker
+ * script in the project Makefile.
+ */
+#define STM32F103xB
+
+/*
+ * IO pins assignments
+ *
+ * numbering is sorted by onboard/connectors, as from the schematics in
+ * http://www.vcc-gnd.com/read.php?tid=369
+ */
+
+/* on-board */
+#define GPIOA_USBDM             11      // pin 8
+#define GPIOA_USBDP             12      // pin 9
+
+#define GPIOC_OSC32_IN          14
+#define GPIOC_OSC32_OUT         15
+
+/*
+ * I/O ports initial setup, this configuration is established soon after reset
+ * in the initialization code.
+ *
+ * The digits have the following meaning:
+ *   0 - Analog input.
+ *   1 - Push Pull output 10MHz.
+ *   2 - Push Pull output 2MHz.
+ *   3 - Push Pull output 50MHz.
+ *   4 - Digital input.
+ *   5 - Open Drain output 10MHz.
+ *   6 - Open Drain output 2MHz.
+ *   7 - Open Drain output 50MHz.
+ *   8 - Digital input with PullUp or PullDown resistor depending on ODR.
+ *   9 - Alternate Push Pull output 10MHz.
+ *   A - Alternate Push Pull output 2MHz.
+ *   B - Alternate Push Pull output 50MHz.
+ *   C - Reserved.
+ *   D - Alternate Open Drain output 10MHz.
+ *   E - Alternate Open Drain output 2MHz.
+ *   F - Alternate Open Drain output 50MHz.
+ * Please refer to the STM32 Reference Manual for details.
+ */
+
+/*
+ * Port A setup.
+ * Everything input with pull-up except:
+ */
+#define VAL_GPIOACRL            0x88888888      /*  PA7...PA0 */
+#define VAL_GPIOACRH            0x88888888      /* PA15...PA8 */
+#define VAL_GPIOAODR            0xFFFFFFFF
+
+/*
+ * Port B setup.
+ * Everything input with pull-up except:
+ */
+#define VAL_GPIOBCRL            0x88888888      /*  PB7...PB0 */
+#define VAL_GPIOBCRH            0x88888888      /* PB15...PB8 */
+#define VAL_GPIOBODR            0xFFFFFFFF
+
+/*
+ * Port C setup.
+ * Everything input with pull-up except:
+ */
+#define VAL_GPIOCCRL            0x88888888      /*  PC7...PC0 */
+#define VAL_GPIOCCRH            0x88888888      /* PC15...PC8 */
+#define VAL_GPIOCODR            0xFFFFFFFF
+
+/*
+ * Port D setup.
+ * Everything input with pull-up except:
+ * PD0  - Normal input (XTAL).
+ * PD1  - Normal input (XTAL).
+ */
+#define VAL_GPIODCRL            0x88888844      /*  PD7...PD0 */
+#define VAL_GPIODCRH            0x88888888      /* PD15...PD8 */
+#define VAL_GPIODODR            0xFFFFFFFF
+
+/*
+ * Port E setup.
+ * Everything input with pull-up except:
+ */
+#define VAL_GPIOECRL            0x88888888      /*  PE7...PE0 */
+#define VAL_GPIOECRH            0x88888888      /* PE15...PE8 */
+#define VAL_GPIOEODR            0xFFFFFFFF
+
+/*
+ * USB bus activation macro, required by the USB driver.
+ */
+#define usb_lld_connect_bus(usbp)	/* always connected */
+
+/*
+ * USB bus de-activation macro, required by the USB driver.
+ */
+#define usb_lld_disconnect_bus(usbp)	/* always connected */
+
+#if !defined(_FROM_ASM_)
+#ifdef __cplusplus
+extern "C" {
+#endif
+  void boardInit(void);
+#ifdef __cplusplus
+}
+#endif
+#endif /* _FROM_ASM_ */
+
+#endif /* _BOARD_H_ */

keyboards/ergodox_stm32/boards/ERGODOX_STM32_BOARD/board.mk

@@ -0,0 +1,5 @@
+# List of all the board related files.
+BOARDSRC = $(BOARD_PATH)/boards/ERGODOX_STM32_BOARD/board.c
+
+# Required include directories
+BOARDINC = $(BOARD_PATH)/boards/ERGODOX_STM32_BOARD