Merge pull request #47 from swiftgeek/XTW100

Add XTW100 support

boards/xtw100.h

@@ -0,0 +1,40 @@
+#ifndef __BOARD_H__
+#define __BOARD_H__
+
+#include <stdbool.h>
+#include <libopencm3/stm32/rcc.h>
+#include <libopencm3/stm32/gpio.h>
+
+#include <libopencm3/cm3/nvic.h>
+
+
+#define BOARD_USE_DEBUG_PINS_AS_GPIO false /* We don't have to disable SWD to access GPIO's on these boards */
+
+#define BOARD_RCC_LED                RCC_GPIOB
+#define BOARD_PORT_LED               GPIOB
+#define BOARD_PIN_LED                GPIO7
+#define BOARD_LED_HIGH_IS_BUSY       true
+
+#define BOARD_RCC_USB_PULLUP         RCC_GPIOB
+#define BOARD_PORT_USB_PULLUP        GPIOB
+#define BOARD_PIN_USB_PULLUP         GPIO8
+#define BOARD_USB_HIGH_IS_PULLUP     true
+
+/* Currently you can only use SPI1, since it has highest clock. */
+
+#define HAS_BOARD_INIT 1
+void board_init (void) {
+// Enable power LED (PB6)
+  gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO6);
+  gpio_set(GPIOB, GPIO6);
+// Toggle power to the 25xx flash chip
+// PB2 + PB1 serve as GND supply, GPIO_50_MHZ to increase drive current
+  gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO1|GPIO2);
+  gpio_clear(GPIOB, GPIO1|GPIO2);
+// Set #WP and #HOLD high (PA2|PA3)
+  rcc_periph_clock_enable(RCC_GPIOA);
+  gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO2|GPIO3);
+  gpio_set(GPIOA, GPIO2|GPIO3);
+}
+
+#endif /* __BOARD_H__ */

boards/xtw100.mk

@@ -0,0 +1 @@
+stm32f103.mk

vserprog.c

@@ -407,6 +407,10 @@ int main(void) {
 #endif /* STM32F0 */
 
   usbcdc_init();
+#ifdef HAS_BOARD_INIT
+  board_init();
+#endif
+
   spi_setup(SPI_DEFAULT_CLOCK);
 
   /* The loop. */