diff options
Diffstat (limited to 'nuttx/arch/arm/src/stm32')
-rw-r--r-- | nuttx/arch/arm/src/stm32/chip/stm32_pwr.h | 6 | ||||
-rw-r--r-- | nuttx/arch/arm/src/stm32/stm32_lowputc.c | 2 | ||||
-rw-r--r-- | nuttx/arch/arm/src/stm32/stm32_pwr.c | 53 | ||||
-rw-r--r-- | nuttx/arch/arm/src/stm32/stm32_pwr.h | 27 | ||||
-rw-r--r-- | nuttx/arch/arm/src/stm32/stm32_serial.c | 1 | ||||
-rw-r--r-- | nuttx/arch/arm/src/stm32/stm32l15xxx_rcc.c | 25 |
6 files changed, 100 insertions, 14 deletions
diff --git a/nuttx/arch/arm/src/stm32/chip/stm32_pwr.h b/nuttx/arch/arm/src/stm32/chip/stm32_pwr.h index 9f1220ba9..430624d3b 100644 --- a/nuttx/arch/arm/src/stm32/chip/stm32_pwr.h +++ b/nuttx/arch/arm/src/stm32/chip/stm32_pwr.h @@ -108,9 +108,9 @@ # define PWR_CR_ULP (1 << 9) /* Ultralow power mode */ # define PWR_CR_FWU (1 << 10) /* Low power run mode */ # define PWR_CR_VOS_MASK (3 << 11) /* Bits 11-12: Regulator voltage scaling output selection */ -# define PWR_CR_VOS_SCALE_1 (1 << 11) /* 1.8 V (range 1) */ -# define PWR_CR_VOS_SCALE_2 (2 << 11) /* 1.5 V (range 2) */ -# define PWR_CR_VOS_SCALE_3 (3 << 11) /* 1.2 V (range 3) */ +# define PWR_CR_VOS_SCALE_1 (1 << 11) /* 1.8 V (range 1) PLL VCO Max = 96MHz */ +# define PWR_CR_VOS_SCALE_2 (2 << 11) /* 1.5 V (range 2) PLL VCO Max = 64MHz */ +# define PWR_CR_VOS_SCALE_3 (3 << 11) /* 1.2 V (range 3) PLL VCO Max = 24MHz */ # define PWR_CR_LPRUN (1 << 14) /* Low power run mode */ #endif diff --git a/nuttx/arch/arm/src/stm32/stm32_lowputc.c b/nuttx/arch/arm/src/stm32/stm32_lowputc.c index 49ac15e9a..f733aad80 100644 --- a/nuttx/arch/arm/src/stm32/stm32_lowputc.c +++ b/nuttx/arch/arm/src/stm32/stm32_lowputc.c @@ -621,5 +621,3 @@ void stm32_lowsetup(void) #else # error "Unsupported STM32 chip" #endif - - diff --git a/nuttx/arch/arm/src/stm32/stm32_pwr.c b/nuttx/arch/arm/src/stm32/stm32_pwr.c index 14149922f..1c9513541 100644 --- a/nuttx/arch/arm/src/stm32/stm32_pwr.c +++ b/nuttx/arch/arm/src/stm32/stm32_pwr.c @@ -2,7 +2,9 @@ * arch/arm/src/stm32/stm32_pwr.c * * Copyright (C) 2011 Uros Platise. All rights reserved. - * Author: Uros Platise <uros.platise@isotel.eu> + * Copyright (C) 2013 Gregory Nutt. All rights reserved. + * Authors: Uros Platise <uros.platise@isotel.eu> + * Gregory Nutt <gnutt@nuttx.org> * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -58,17 +60,17 @@ static inline uint16_t stm32_pwr_getreg(uint8_t offset) { - return getreg32(STM32_PWR_BASE + offset); + return (uint16_t)getreg32(STM32_PWR_BASE + (uint32_t)offset); } static inline void stm32_pwr_putreg(uint8_t offset, uint16_t value) { - putreg32(value, STM32_PWR_BASE + offset); + putreg32((uint32_t)value, STM32_PWR_BASE + (uint32_t)offset); } static inline void stm32_pwr_modifyreg(uint8_t offset, uint16_t clearbits, uint16_t setbits) { - modifyreg32(STM32_PWR_BASE + offset, clearbits, setbits); + modifyreg32(STM32_PWR_BASE + (uint32_t)offset, (uint32_t)clearbits, (uint32_t)setbits); } /************************************************************************************ @@ -95,4 +97,47 @@ void stm32_pwr_enablebkp(void) stm32_pwr_modifyreg(STM32_PWR_CR_OFFSET, 0, PWR_CR_DBP); } +/************************************************************************************ + * Name: stm32_pwr_setvos + * + * Description: + * Set voltage scaling for EneryLite devices. + * + * Input Parameters: + * vos - Properly aligned voltage scaling select bits for the PWR_CR register. + * + * Returned Values: + * None + * + * Assumptions: + * At present, this function is called only from initialization logic. If used + * for any other purpose that protection to assure that its operation is atomic + * will be required. + * + ************************************************************************************/ + +#ifdef CONFIG_STM32_ENERGYLITE +void stm32_pwr_setvos(uint16_t vos) +{ + uint16_t regval; + + /* The following sequence is required to program the voltage regulator ranges: + * 1. Check VDD to identify which ranges are allowed... + * 2. Poll VOSF bit of in PWR_CSR. Wait until it is reset to 0. + * 3. Configure the voltage scaling range by setting the VOS bits in the PWR_CR + * register. + * 4. Poll VOSF bit of in PWR_CSR register. Wait until it is reset to 0. + */ + + while((stm32_pwr_getreg(STM32_PWR_CSR_OFFSET) & PWR_CSR_VOSF) != 0); + + regval = stm32_pwr_getreg(STM32_PWR_CR_OFFSET); + regval &= ~PWR_CR_VOS_MASK; + regval |= (vos & PWR_CR_VOS_MASK); + stm32_pwr_putreg(STM32_PWR_CR_OFFSET, regval); + + while((stm32_pwr_getreg(STM32_PWR_CSR_OFFSET) & PWR_CSR_VOSF) != 0); +} +#endif + #endif /* CONFIG_STM32_PWR */ diff --git a/nuttx/arch/arm/src/stm32/stm32_pwr.h b/nuttx/arch/arm/src/stm32/stm32_pwr.h index 7a2751677..63ae14429 100644 --- a/nuttx/arch/arm/src/stm32/stm32_pwr.h +++ b/nuttx/arch/arm/src/stm32/stm32_pwr.h @@ -1,7 +1,7 @@ /************************************************************************************ * arch/arm/src/stm32/stm32_pwr.h * - * Copyright (C) 2009 Gregory Nutt. All rights reserved. + * Copyright (C) 2009, 2013 Gregory Nutt. All rights reserved. * Author: Gregory Nutt <gnutt@nuttx.org> * * Redistribution and use in source and binary forms, with or without @@ -78,7 +78,30 @@ extern "C" { * ************************************************************************************/ -EXTERN void stm32_pwr_enablebkp(void); +void stm32_pwr_enablebkp(void); + +/************************************************************************************ + * Name: stm32_pwr_setvos + * + * Description: + * Set voltage scaling for EneryLite devices. + * + * Input Parameters: + * vos - Properly aligned voltage scaling select bits for the PWR_CR register. + * + * Returned Values: + * None + * + * Assumptions: + * At present, this function is called only from initialization logic. If used + * for any other purpose that protection to assure that its operation is atomic + * will be required. + * + ************************************************************************************/ + +#ifdef CONFIG_STM32_ENERGYLITE +void stm32_pwr_setvos(uint16_t vos); +#endif #undef EXTERN #if defined(__cplusplus) diff --git a/nuttx/arch/arm/src/stm32/stm32_serial.c b/nuttx/arch/arm/src/stm32/stm32_serial.c index 4a06faee6..af95244f0 100644 --- a/nuttx/arch/arm/src/stm32/stm32_serial.c +++ b/nuttx/arch/arm/src/stm32/stm32_serial.c @@ -1214,6 +1214,7 @@ static void up_setspeed(struct uart_dev_s *dev) static int up_setup(struct uart_dev_s *dev) { struct up_dev_s *priv = (struct up_dev_s*)dev->priv; + #ifndef CONFIG_SUPPRESS_UART_CONFIG uint32_t regval; diff --git a/nuttx/arch/arm/src/stm32/stm32l15xxx_rcc.c b/nuttx/arch/arm/src/stm32/stm32l15xxx_rcc.c index e8895dd89..1063c27c1 100644 --- a/nuttx/arch/arm/src/stm32/stm32l15xxx_rcc.c +++ b/nuttx/arch/arm/src/stm32/stm32l15xxx_rcc.c @@ -1,5 +1,7 @@ /**************************************************************************** * arch/arm/src/stm32/stm32l15xxx_rcc.c + * For STM32L100xx, STM32L151xx, STM32L152xx and STM32L162xx advanced ARM- + * based 32-bit MCUs * * Copyright (C) 2013 Gregory Nutt. All rights reserved. * Author: Gregory Nutt <gnutt@nuttx.org> @@ -134,7 +136,11 @@ static inline void rcc_reset(void) putreg32(0, STM32_RCC_CIR); /* Disable all interrupts */ - /* Rest the FLASH controller to 32-bit mode, no wait states. + /* Go to the (default) voltage range 2 */ + + stm32_pwr_setvos(PWR_CR_VOS_SCALE_2); + + /* Reset the FLASH controller to 32-bit mode, no wait states. * * First, program the new number of WS to the LATENCY bit in Flash access * control register (FLASH_ACR) @@ -490,8 +496,21 @@ static void stm32_stdclockconfig(void) { uint32_t regval; - /* First, enable the source clock only the PLL (via HSE or HSI), HSE, and HSI - * are supported in this implementation. + /* Go to the high performance voltage range 1 if necessary. In this mode, + * the PLL VCO frequency can be up to 96MHz. USB and SDIO can be supported. + * + * Range 1: PLLVCO up to 96MHz in range 1 (1.8V) + * Range 2: PLLVCO up to 48MHz in range 2 (1.5V) + * Range 3: PLLVCO up to 24MHz in range 3 (1.2V) + */ + +#if STM32_PLL_FREQUENCY > 48000000 + stm32_pwr_setvos(PWR_CR_VOS_SCALE_1); +#endif + + /* Enable the source clock for the PLL (via HSE or HSI), HSE, and HSI. + * NOTE that only PLL, HSE, or HSI are supported for the system clock + * in this implementation */ #if (STM32_CFGR_PLLSRC == RCC_CFGR_PLLSRC) || (STM32_SYSCLK_SW == RCC_CFGR_SW_HSE) |