altos: Make STM clock configuration per-product. Fix 32MHz CPU speed

[fw/altos] / src / megametrum-v0.1 / ao_pins.h

diff --git a/src/megametrum-v0.1/ao_pins.h b/src/megametrum-v0.1/ao_pins.h
index 803678b2b5b08fa8b99c0e13fce0f95250b49cfe..f5789cf9df993d2b3bdd277fb3d6e359cbe9497d 100644 (file)
--- a/src/megametrum-v0.1/ao_pins.h
+++ b/src/megametrum-v0.1/ao_pins.h
@@ -18,6 +18,29 @@
 #ifndef _AO_PINS_H_
 #define _AO_PINS_H_
 
+/* 8MHz High speed external crystal */
+#define AO_HSE                 8000000
+
+/* PLLVCO = 96MHz (so that USB will work*/
+#define AO_PLLMUL              12
+#define AO_RCC_CFGR_PLLMUL     (STM_RCC_CFGR_PLLMUL_12)
+
+/* SYSCLK = 32MHz (no need to go faster than CPU) */
+#define AO_PLLDIV              3
+#define AO_RCC_CFGR_PLLDIV     (STM_RCC_CFGR_PLLDIV_3)
+
+/* HCLK = 32MHz (CPU clock) */
+#define AO_AHB_PRESCALER       1
+#define AO_RCC_CFGR_HPRE_DIV   STM_RCC_CFGR_HPRE_DIV_1
+
+/* Run APB1 at 16MHz (HCLK/2) */
+#define AO_APB1_PRESCALER      2
+#define AO_RCC_CFGR_PPRE1_DIV  STM_RCC_CFGR_PPRE2_DIV_2
+
+/* Run APB2 at 16MHz (HCLK/2) */
+#define AO_APB2_PRESCALER      2
+#define AO_RCC_CFGR_PPRE2_DIV  STM_RCC_CFGR_PPRE2_DIV_2
+
 #define HAS_SERIAL_1           1
 #define USE_SERIAL_1_STDIN     1
 #define SERIAL_1_PB6_PB7       0