Fix STM32L-Discovery clock setup - The X3 crystal is not fitted on the board
This commit is contained in:
Gregory Nutt
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57e83aafd0
commit
78457c51a4
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@ -444,6 +444,11 @@ GND and (external) 5V are available on both P1 and P2. Note: These signals
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may be at lower voltage levels and, hence, may not properly drive an external
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RS-232 transceiver.
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NOTE: The crystal X3 is not installed on the STM32L3-Discovery. As a
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result, the HSE clock is not availabled and the less acurate HSI must be
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used. This may limit the accuracy of the computed baud, especially at
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higher BAUD.
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A USB serial console is another option.
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Debugging
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@ -707,6 +712,8 @@ Where <subdir> is one of the following:
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USB converter. The UART1 TX and RX pins should be available on
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PA9 and PA10, respectively.
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The serial console is configured for 57600 8N1
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3. Support for NSH built-in applications is *not* enabled.
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4. By default, this configuration uses the CodeSourcery toolchain
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@ -60,7 +60,8 @@
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* - HSI high-speed internal oscillator clock
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* Generated from an internal 16 MHz RC oscillator
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* - HSE high-speed external oscillator clock
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* Driven by the 8MHz crystal (X1) on the OSC_IN and OSC_OUT pins
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* Normally driven by an external crystal (X3). However, this crystal is not fitted
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* on the STM32L-Discovery board.
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* - PLL clock
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* - MSI multispeed internal oscillator clock
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* The MSI clock signal is generated from an internal RC oscillator. Seven frequency
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@ -74,7 +75,7 @@
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* Driven by 32.768KHz crystal (X2) on the OSC32_IN and OSC32_OUT pins.
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*/
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#define STM32_BOARD_XTAL 8000000ul /* X1 on board */
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#define STM32_BOARD_XTAL 8000000ul /* X3 on board (not fitted)*/
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#define STM32_HSI_FREQUENCY 16000000ul /* Approximately 16MHz */
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#define STM32_HSE_FREQUENCY STM32_BOARD_XTAL
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@ -84,11 +85,11 @@
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/* PLL Configuration
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*
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* - PLL source is HSE/1 -> 8MHz input
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* - PLL multipler is 8 -> 64MHz PLL VCO clock output
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* - PLL source is HSI -> 16MHz input (nominal)
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* - PLL multipler is 4 -> 64MHz PLL VCO clock output
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* - PLL output divider 2 -> 32MHz divided down PLL VCO clock output
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*
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* Resulting SYSCLK frequency is 8MHz (XTAL) x 8 / 2 = 32MHz
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* Resulting SYSCLK frequency is 16MHz x 4 / 2 = 32MHz
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*
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* USB/SDIO:
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* If the USB or SDIO interface is used in the application, the PLL VCO
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@ -105,10 +106,10 @@
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* The minimum input clock frequency for PLL is 2 MHz (when using HSE as PLL source).
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*/
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#define STM32_CFGR_PLLSRC RCC_CFGR_PLLSRC /* Source is 8MHz HSE */
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#define STM32_CFGR_PLLMUL RCC_CFGR_PLLMUL_CLKx8 /* PLLMUL = 8 */
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#define STM32_CFGR_PLLSRC 0 /* Source is 16MHz HSI */
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#define STM32_CFGR_PLLMUL RCC_CFGR_PLLMUL_CLKx4 /* PLLMUL = 4 */
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#define STM32_CFGR_PLLDIV RCC_CFGR_PLLDIV_2 /* PLLDIV = 2 */
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#define STM32_PLL_FREQUENCY (8*STM32_BOARD_XTAL) /* PLL VCO Frequency is 64MHz */
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#define STM32_PLL_FREQUENCY (4*STM32_HSE_FREQUENCY) /* PLL VCO Frequency is 64MHz */
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/* Use the PLL and set the SYSCLK source to be the diveded down PLL VCO output
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* frequency (STM32_PLL_FREQUENCY divided by the PLLDIV value).
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@ -292,7 +293,7 @@ extern "C" {
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*
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************************************************************************************/
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EXTERN void stm32_boardinitialize(void);
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void stm32_boardinitialize(void);
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/************************************************************************************
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* Name: stm32_ledinit, stm32_setled, and stm32_setleds
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@ -305,9 +306,9 @@ EXTERN void stm32_boardinitialize(void);
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************************************************************************************/
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#ifndef CONFIG_ARCH_LEDS
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EXTERN void stm32_ledinit(void);
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EXTERN void stm32_setled(int led, bool ledon);
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EXTERN void stm32_setleds(uint8_t ledset);
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void stm32_ledinit(void);
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void stm32_setled(int led, bool ledon);
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void stm32_setleds(uint8_t ledset);
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#endif
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/************************************************************************************
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@ -334,10 +335,10 @@ EXTERN void stm32_setleds(uint8_t ledset);
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************************************************************************************/
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#ifdef CONFIG_ARCH_BUTTONS
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EXTERN void up_buttoninit(void);
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EXTERN uint8_t up_buttons(void);
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void up_buttoninit(void);
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uint8_t up_buttons(void);
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#ifdef CONFIG_ARCH_IRQBUTTONS
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EXTERN xcpt_t up_irqbutton(int id, xcpt_t irqhandler);
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xcpt_t up_irqbutton(int id, xcpt_t irqhandler);
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#endif
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#endif
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@ -406,7 +406,7 @@ CONFIG_USART1_SERIAL_CONSOLE=y
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#
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CONFIG_USART1_RXBUFSIZE=64
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CONFIG_USART1_TXBUFSIZE=64
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CONFIG_USART1_BAUD=115200
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CONFIG_USART1_BAUD=57600
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CONFIG_USART1_BITS=8
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CONFIG_USART1_PARITY=0
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CONFIG_USART1_2STOP=0
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@ -112,7 +112,7 @@ void stm32_setled(int led, bool ledon)
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{
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ledcfg = GPIO_LED1;
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}
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else if (led == BOARD_LED1)
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else if (led == BOARD_LED2)
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{
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ledcfg = GPIO_LED2;
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}
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@ -63,20 +63,19 @@
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#endif
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/* STM32L-Discovery GPIOs ***************************************************************************/
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/* The STM32L-Discovery board has four LEDs. Two of these are controlled by
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* logic on the board and are not available for software control:
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/* The STM32L-Discovery board has four LEDs. Two of these are controlled by logic on the board and
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* are not available for software control:
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*
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* LD1 COM: LD2 default status is red. LD2 turns to green to indicate that
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* communications are in progress between the PC and the ST-LINK/V2.
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* LD1 COM: LD2 default status is red. LD2 turns to green to indicate that communications are in
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* progress between the PC and the ST-LINK/V2.
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* LD2 PWR: Red LED indicates that the board is powered.
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*
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* And two LEDs can be controlled by software:
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*
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* User LD3: Green LED is a user LED connected to the I/O PB7 of the STM32L152
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* MCU.
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* User LD4: Blue LED is a user LED connected to the I/O PB6 of the STM32L152
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* MCU.
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* User LD3: Green LED is a user LED connected to the I/O PB7 of the STM32L152 MCU.
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* User LD4: Blue LED is a user LED connected to the I/O PB6 of the STM32L152 MCU.
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*
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* The other side of the LED connects to ground so high value will illuminate the LED.
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*/
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#define GPIO_LED1 (GPIO_OUTPUT | GPIO_PUSHPULL | GPIO_SPEED_10MHz | \
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@ -85,8 +84,7 @@
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GPIO_OUTPUT_CLEAR | GPIO_PORTB | GPIO_PIN6)
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/* Button definitions *******************************************************************************/
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/* The STM32L-Discovery supports two buttons; only one button is controllable by
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* software:
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/* The STM32L-Discovery supports two buttons; only one button is controllable by software:
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*
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* B1 USER: user and wake-up button connected to the I/O PA0 of the STM32F303VCT6.
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* B2 RESET: pushbutton connected to NRST is used to RESET the STM32F303VCT6.
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