X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=src%2Fstmf0%2Fao_timer.c;h=58e52995cf32f35cbb4146b092f60e6217771972;hp=2cb994c35df6408ff1c4ee14b546e880ce97376c;hb=cd920a0e5321166ef8b1d6afc3d63fc5de998a93;hpb=1085ec5d57e0ed5d132f2bbdac1a0b6a32c0ab4a

diff --git a/src/stmf0/ao_timer.c b/src/stmf0/ao_timer.c
index 2cb994c3..58e52995 100644
--- a/src/stmf0/ao_timer.c
+++ b/src/stmf0/ao_timer.c
@@ -35,9 +35,25 @@ ao_time(void)
 	return ao_tick_count;
 }
 
+uint64_t
+ao_time_ns(void)
+{
+	AO_TICK_TYPE	before, after;
+	uint32_t	cvr;
+
+	do {
+		before = ao_tick_count;
+		cvr = stm_systick.cvr;
+		after = ao_tick_count;
+	} while (before != after);
+
+	return (uint64_t) after * (1000000000ULL / AO_HERTZ) +
+		(uint64_t) cvr * (1000000000ULL / AO_SYSTICK);
+}
+
 #if AO_DATA_ALL
-volatile __data uint8_t	ao_data_interval = 1;
-volatile __data uint8_t	ao_data_count;
+volatile uint8_t	ao_data_interval = 1;
+volatile uint8_t	ao_data_count;
 #endif
 
 void stm_systick_isr(void)
@@ -86,6 +102,7 @@ ao_timer_set_adc_interval(uint8_t interval)
 void
 ao_timer_init(void)
 {
+	stm_systick.csr = 0;
 	stm_systick.rvr = SYSTICK_RELOAD;
 	stm_systick.cvr = 0;
 	stm_systick.csr = ((1 << STM_SYSTICK_CSR_ENABLE) |
@@ -176,13 +193,12 @@ ao_clock_normal_start(void)
 	while (!(stm_rcc.cr & (1 << STM_RCC_CR_HSERDY)))
 		asm("nop");
 
-#ifdef STM_PLLSRC
 	/* Disable the PLL */
 	stm_rcc.cr &= ~(1 << STM_RCC_CR_PLLON);
 	while (stm_rcc.cr & (1 << STM_RCC_CR_PLLRDY))
 		asm("nop");
 
-	/* PLLVCO to 48MHz (for USB) -> PLLMUL = 3 */
+	/* Set multiplier */
 	cfgr = stm_rcc.cfgr;
 	cfgr &= ~(STM_RCC_CFGR_PLLMUL_MASK << STM_RCC_CFGR_PLLMUL);
 	cfgr |= (AO_RCC_CFGR_PLLMUL << STM_RCC_CFGR_PLLMUL);
@@ -192,8 +208,8 @@ ao_clock_normal_start(void)
 	cfgr |= (STM_RCC_CFGR_PLLSRC_TARGET_CLOCK  << STM_RCC_CFGR_PLLSRC);
 	stm_rcc.cfgr = cfgr;
 
-	/* Disable pre divider */
-	stm_rcc.cfgr2 = (STM_RCC_CFGR2_PREDIV_1 << STM_RCC_CFGR2_PREDIV);
+	/* Set pre divider */
+	stm_rcc.cfgr2 = (AO_RCC_CFGR2_PLLDIV << STM_RCC_CFGR2_PREDIV);
 
 	/* Enable the PLL and wait for it */
 	stm_rcc.cr |= (1 << STM_RCC_CR_PLLON);
@@ -202,9 +218,6 @@ ao_clock_normal_start(void)
 
 #endif
 
-#endif
-
-
 #if AO_HSI48
 #define STM_RCC_CFGR_SWS_TARGET_CLOCK		STM_RCC_CFGR_SWS_HSI48
 #define STM_RCC_CFGR_SW_TARGET_CLOCK		STM_RCC_CFGR_SW_HSI48
@@ -226,6 +239,8 @@ ao_clock_normal_start(void)
 #define STM_PLLSRC				STM_HSI
 #define STM_RCC_CFGR_PLLSRC_TARGET_CLOCK	0
 #endif
+
+
 }
 
 static void
@@ -303,14 +318,34 @@ ao_clock_init(void)
 	/* Clear reset flags */
 	stm_rcc.csr |= (1 << STM_RCC_CSR_RMVF);
 
+#ifdef AO_MCO_PORT
+	cfgr = stm_rcc.cfgr;
+
+	/* Send PLL clock to MCO */
+	cfgr &= ~(STM_RCC_CFGR_MCO_MASK << STM_RCC_CFGR_MCO);
+	cfgr |= (STM_RCC_CFGR_MCO_PLLCLK << STM_RCC_CFGR_MCO);
+
+	/* Divide by 1 */
+	cfgr &= ~(STM_RCC_CFGR_MCOPRE_DIV_MASK << STM_RCC_CFGR_MCOPRE);
+	cfgr |= (STM_RCC_CFGR_MCOPRE_DIV_1 << STM_RCC_CFGR_MCOPRE);
+
+	/* Don't divide PLL */
+	cfgr |= (1 << STM_RCC_CFGR_PLL_NODIV);
+
+	stm_rcc.cfgr = cfgr;
+
+	ao_enable_port(AO_MCO_PORT);
+	stm_ospeedr_set(AO_MCO_PORT, AO_MCO_PIN, STM_OSPEEDR_HIGH);
+	stm_afr_set(AO_MCO_PORT, AO_MCO_PIN, AO_MCO_AF);
+#endif
+
 #if DEBUG_THE_CLOCK
 	/* Output SYSCLK on PA8 for measurments */
 
 	stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_GPIOAEN);
 
 	stm_afr_set(&stm_gpioa, 8, STM_AFR_AF0);
-	stm_moder_set(&stm_gpioa, 8, STM_MODER_ALTERNATE);
-	stm_ospeedr_set(&stm_gpioa, 8, STM_OSPEEDR_40MHz);
+	stm_ospeedr_set(&stm_gpioa, 8, STM_OSPEEDR_HIGH);
 
 	stm_rcc.cfgr |= (STM_RCC_CFGR_MCOPRE_DIV_1 << STM_RCC_CFGR_MCOPRE);
 	stm_rcc.cfgr |= (STM_RCC_CFGR_MCOSEL_HSE << STM_RCC_CFGR_MCOSEL);