diff options
Diffstat (limited to 'board/zinger/board.c')
| -rw-r--r-- | board/zinger/board.c | 197 |
1 files changed, 12 insertions, 185 deletions
diff --git a/board/zinger/board.c b/board/zinger/board.c index f48979dbd0..9a830e7e14 100644 --- a/board/zinger/board.c +++ b/board/zinger/board.c @@ -6,205 +6,32 @@ #include "common.h" #include "debug.h" +#include "irq_handler.h" #include "registers.h" -#include "timer.h" +#include "usb_pd.h" #include "util.h" -static void clock_init(void) -{ - /* put 1 Wait-State for flash access to ensure proper reads at 48Mhz */ - STM32_FLASH_ACR = 0x1001; /* 1 WS / Prefetch enabled */ - - /* Ensure that HSI8 is ON */ - if (!(STM32_RCC_CR & (1 << 1))) { - /* Enable HSI */ - STM32_RCC_CR |= 1 << 0; - /* Wait for HSI to be ready */ - while (!(STM32_RCC_CR & (1 << 1))) - ; - } - /* PLLSRC = HSI, PLLMUL = x12 (x HSI/2) = 48Mhz */ - STM32_RCC_CFGR = 0x00288000; - /* Enable PLL */ - STM32_RCC_CR |= 1 << 24; - /* Wait for PLL to be ready */ - while (!(STM32_RCC_CR & (1 << 25))) - ; - - /* switch SYSCLK to PLL */ - STM32_RCC_CFGR = 0x00288002; - /* wait until the PLL is the clock source */ - while ((STM32_RCC_CFGR & 0xc) != 0x8) - ; -} - -static void power_init(void) -{ - /* enable SYSCFG, COMP, ADC, SPI1, USART1, TIM17 */ - STM32_RCC_APB2ENR = 0x00045201; - /* enable TIM2, TIM14, PWR */ - STM32_RCC_APB1ENR = 0x10000101; - /* enable DMA, SRAM, CRC, GPA, GPB, GPC, GPF */ - STM32_RCC_AHBENR = 0x4e0045; - /* TODO: remove GPC on real board */ -} - -/* GPIO setting helpers */ -#define OUT(n) (1 << ((n) * 2)) -#define AF(n) (2 << ((n) * 2)) -#define ANALOG(n) (3 << ((n) * 2)) -#define HIGH(n) (1 << (n)) -#define ODR(n) (1 << (n)) -#define HISPEED(n) (3 << ((n) * 2)) -#define AFx(n, x) (x << (((n) % 8) * 4)) -/* GPIO level setting helpers through BSRR register */ -#define GPIO_SET(n) (1 << (n)) -#define GPIO_RESET(n) (1 << ((n) + 16)) - -static void pins_init(void) -{ - /* Pin usage: - * PA0 () : Wakeup on Vnc / Threshold - * PA1 (ANALOG - ADC_IN1) : CC sense - * PA2 (ANALOG - ADC_IN2) : Current sense - * PA3 (ANALOG - ADC_IN3) : Voltage sense - * PA4 (OUT - OD GPIO) : PD TX enable - * PA5 (AF0 - SPI1_SCK) : TX clock in - * PA6 (AF0 - SPI1_MISO) : PD TX - * PA7 (AF5 - TIM17_CH1) : PD RX - * PA9 (AF1 - UART1_TX) : [DEBUG] UART TX - * PA10 (AF1 - UART1_RX) : [DEBUG] UART RX - * PA13 (OUT - GPIO) : voltage select[0] - * PA14 (OUT - GPIO) : voltage select[1] - * PB1 (AF0 - TIM14_CH1) : TX clock out - * PF0 (OUT - GPIO) : LM5050 FET driver off - * PF1 (OUT - GPIO) : discharge FET - */ - STM32_GPIO_ODR(GPIO_A) = HIGH(4) | HIGH(6); - STM32_GPIO_AFRL(GPIO_A) = AFx(7, 5); - STM32_GPIO_AFRH(GPIO_A) = AFx(9, 1) | AFx(10, 1); - STM32_GPIO_OTYPER(GPIO_A) = ODR(4) | ODR(6); - STM32_GPIO_OSPEEDR(GPIO_A) = HISPEED(5) | HISPEED(6) | HISPEED(7); - STM32_GPIO_MODER(GPIO_A) = ANALOG(1) | ANALOG(2) | ANALOG(3) | OUT(4) - | AF(5) /*| AF(6)*/ | AF(7) | AF(9) | AF(10) - | OUT(13) | OUT(14); - /* set PF0 / PF1 as output, PF0 is open-drain, high by default */ - STM32_GPIO_ODR(GPIO_F) = HIGH(0); - STM32_GPIO_MODER(GPIO_F) = OUT(0) | OUT(1); - STM32_GPIO_OTYPER(GPIO_F) = ODR(1); - - /* Set PB1 as AF0 (TIM14_CH1) */ - STM32_GPIO_OSPEEDR(GPIO_B) = HISPEED(1); - STM32_GPIO_MODER(GPIO_B) = AF(1); - - /* --- dev board only --- */ - /* - * Blue LED : PC8 (OUT) - * Green LED : PC9 (OUT) - */ - STM32_GPIO_ODR(GPIO_C) = HIGH(9); - STM32_GPIO_MODER(GPIO_C) = OUT(8) | OUT(9); -} - - -static void uart_init(void) -{ - /* set baudrate */ - STM32_USART_BRR(UARTN) = - DIV_ROUND_NEAREST(CPU_CLOCK, CONFIG_UART_BAUD_RATE); - /* UART enabled, 8 Data bits, oversampling x16, no parity */ - STM32_USART_CR1(UARTN) = - STM32_USART_CR1_UE | STM32_USART_CR1_TE | STM32_USART_CR1_RE; - /* 1 stop bit, no fancy stuff */ - STM32_USART_CR2(UARTN) = 0x0000; - /* DMA disabled, special modes disabled, error interrupt disabled */ - STM32_USART_CR3(UARTN) = 0x0000; -} - -static void timers_init(void) -{ - /* TIM2 is a 32-bit free running counter with 1Mhz frequency */ - STM32_TIM_CR2(2) = 0x0000; - STM32_TIM32_ARR(2) = 0xFFFFFFFF; - STM32_TIM32_CNT(2) = 0; - STM32_TIM_PSC(2) = CPU_CLOCK / 1000000 - 1; - STM32_TIM_EGR(2) = 0x0001; /* Reload the pre-scaler */ - STM32_TIM_CR1(2) = 1; -} - -timestamp_t get_time(void) -{ - timestamp_t t; - - t.le.lo = STM32_TIM32_CNT(2); - t.le.hi = 0; - return t; -} - -void udelay(unsigned us) -{ - unsigned t0 = STM32_TIM32_CNT(2); - while ((STM32_TIM32_CNT(2) - t0) < us) - ; -} - -static void hardware_init(void) -{ - power_init(); - clock_init(); - pins_init(); - uart_init(); - timers_init(); -} - -/* ------------------------- Power supply control ------------------------ */ - -/* Output voltage selection */ -enum volt { - VO_5V = GPIO_RESET(13) | GPIO_RESET(14), - VO_12V = GPIO_SET(13) | GPIO_RESET(14), - VO_13V = GPIO_RESET(13) | GPIO_SET(14), - VO_20V = GPIO_SET(13) | GPIO_SET(14), -}; - -static inline void set_output_voltage(enum volt v) -{ - /* set voltage_select on PA13/PA14 */ - STM32_GPIO_BSRR(GPIO_A) = v; -} - -static inline void output_enable(void) -{ - /* GPF0 (FET driver shutdown) = 0 */ - STM32_GPIO_BSRR(GPIO_F) = GPIO_RESET(0); -} +extern void pd_rx_handler(void); -static inline void output_disable(void) +/* External interrupt EXTINT7 for external comparator on PA7 */ +void IRQ_HANDLER(STM32_IRQ_EXTI4_15)(void) { - /* GPF0 (FET driver shutdown) = 1 */ - STM32_GPIO_BSRR(GPIO_F) = GPIO_SET(0); + /* clear the interrupt */ + STM32_EXTI_PR = STM32_EXTI_PR; + /* trigger reception handling */ + pd_rx_handler(); } -/* default forced output voltage */ -#define VO_DEFAULT VO_12V +extern void pd_task(void); int main(void) { hardware_init(); debug_printf("Power supply started ...\n"); - set_output_voltage(VO_DEFAULT); - debug_printf("set output voltage : " STRINGIFY(VO_DEFAULT) "\n"); - output_enable(); + /* background loop for PD events */ + pd_task(); - while (1) { - /* magic LED blinker on the test board */ - STM32_GPIO_BSRR(GPIO_C) = GPIO_SET(8); - udelay(200000); - STM32_GPIO_BSRR(GPIO_C) = GPIO_RESET(8); - udelay(750000); - debug_printf("%T ALIVE\n"); - } while (1) ; } |