Experimental Gpio.HEADmaster

This rapidly blinks the sysled on the stm32.

This shows the ability to manipulate memory mapped registers.

1 files changed, 167 insertions, 0 deletions

diff --git a/src/hal/rcc.rs b/src/hal/rcc.rs
new file mode 100644
index 0000000..1041100
--- /dev/null
+++ b/src/hal/rcc.rs
@@ -0,0 +1,167 @@
+use crate::hal::common::{regset, regget};
+
+#[repr(C)]
+pub struct RccMem {
+    c_r: u32,          /* Clock control register. 0x00 */
+    icsc_r: u32,       /* Internal clock srcs calibration register. 0x04 */
+    cfg_r: u32,        /* clock confguration register. 0x08 */
+    pllcfg_r: u32,     /* PLL Configuration register. 0x0c */
+    pllsai1cfg_r: u32, /* PLLSAI1 configuration register. 0x10 */
+
+    reserved_1: u32, /* Not used. offset 0x14. */
+
+    cie_r: u32, /* Clock interrupt enable register. 0x18 */
+    cif_r: u32, /* Clock interrupt flag regiseter.  0x1c */
+    cic_r: u32, /* Clock interrupt clear register.  0x20 */
+
+    reserved_2: u32, /* Not used. offset 0x24. */
+
+    ahb1rst_r: u32, /* AHB Peripheral 1 reset register. 0x28 */
+    ahb2rst_r: u32, /* AHB Peripheral 2 reset register. 0x2c */
+    ahb3rst_r: u32, /* AHB Peripheral 3 reset register. 0x30 */
+
+    reserved_3: u32, /* Not used. offset 0x34. */
+
+    // #define rcc_lptim1rst (1 << 31)  // Low Power Timer 1 reset
+    // #define rcc_opamprst (1 << 30)  // OPAMP interface reset
+    // #define rcc_dac1rst (1 << 29)  // DAC1 interface reset
+    // #define rcc_pwrrst (1 << 28)  // Power interface reset
+    // #define rcc_can2rst \
+    //   (1 << 26)  // CAN2 reset (this bit is reserved for STM32L47x/L48x devices)
+    // #define rcc_can1rst (1 << 25)  // CAN1 reset
+    // #define rcc_crsrst \
+    //   (1 << 24)  // CRS reset (this bit is reserved for STM32L47x/L48x devices)
+    // #define rcc_i2c3rst (1 << 23)  // I2C3 reset
+    // #define rcc_i2c2rst (1 << 22)  // I2C2 reset
+    // #define rcc_i2c1rst (1 << 21)  // I2C1 reset
+    // #define rcc_uart5rst (1 << 20)  // UART5 reset
+    // #define rcc_uart4rst (1 << 19)  // UART4 reset
+    // #define rcc_usart3rst (1 << 18)  // USART3 reset
+    // #define rcc_usart2rst (1 << 17)  // USART2 reset
+    // #define rcc_reserved (1 << 16)  // must be kept at reset value.
+    // #define rcc_spi3rst (1 << 15)  // SPI3 reset
+    // #define rcc_spi2rst (1 << 14)  // SPI2 reset
+    // #define rcc_lcdrst \
+    //   (1 << 9)  // interface reset (this bit is reserved for STM32L471/L4x5 devices)
+    // #define rcc_tim7rst (1 << 5)  // timer reset
+    // #define rcc_tim6rst (1 << 4)  // timer reset
+    // #define rcc_tim5rst (1 << 3)  // timer reset
+    // #define rcc_tim4rst (1 << 2)  // timer reset
+    // #define rcc_tim3rst (1 << 1)  // timer reset
+    // #define rcc_tim2rst (1 << 0)  // timer reset
+    apb1rst1_r: u32, /* APB Peripheral reset register 1. 0x38 */
+    apb1rst2_r: u32, /* APB Peripheral reset register 2. 0x3C */
+    apb2rst_r: u32,  /* APB Peripheral reset register.   0x40 */
+
+    reserved_4: u32, /* Not used. offset 0x44. */
+
+    // #define rcc_dma1en (1 << 0) /* DMA1 clock enable. */
+    // #define rcc_dma2en (1 << 1) /* DMA2 clock enable. */
+    // #define rcc_flashen (1 << 8) /* Flash memory interface clock enable. */
+    // #define rcc_crcen (1 << 12) /* CRC clock enable. */
+    // #define rcc_tscen (1 << 16) /* Touch sensing controller clock enable. */
+    // #define rcc_dmad2en (1 << 17) /* DMA2D clock enabled. */
+    ahb1en_r: u32, /* AHB1 Peripheral enable register. 0x48 */
+
+    // #define rcc_gpioen(port) (1 << (port))
+    // #define rcc_otgfsen (1 << 12)
+    // #define rcc_adcen (1 << 13)
+    // #define rcc_dcmien (1 << 14)
+    // #define rcc_assen (1 << 16)
+    // #define rcc_hashen (1 << 17)
+    // #define rcc_rngen (1 << 18)
+    ahb2en_r: u32, /* AHB2 Peripheral enable register. 0x4C */
+    ahb3en_r: u32, /* AHB3 Peripheral enable register. 0x50 */
+
+    reserved_5: u32, /* Not used. offset 0x54. */
+
+    // #define rcc_lptim1en (1 << 31) /* Low power timer 1 clock enable */
+    // #define rcc_opampen (1 << 30) /* OPAMP interface clock enable */
+    // #define rcc_dac1en (1 << 29) /* DAC1 interface clock enable */
+    // #define rcc_pwren (1 << 28) /* Power interface clock enable */
+    // #define rcc_can2en (1 << 26) /* CAN2 clock enable (this bit is reserved for STM32L47x/L48x devices) */
+    // #define rcc_can1en (1 << 25) /* CAN1 clock enable */
+    // #define rcc_crsen (1 << 24) /* Clock Recovery System clock enable (this bit is reserved for STM32L47x/L48x */
+    // #define rcc_i2c3en (1 << 23) /* I2C3 clock enable */
+    // #define rcc_i2c2en (1 << 22) /* I2C2 clock enable */
+    // #define rcc_i2c1en (1 << 21) /* I2C1 clock enable */
+    // #define rcc_uart5en (1 << 20) /* UART5 clock enable */
+    // #define rcc_uart4en (1 << 19) /* UART4 clock enable */
+    // #define rcc_usart3en (1 << 18) /* USART3 clock enable */
+    // #define rcc_usart2en (1 << 17) /* USART2 clock enable */
+    // #define rcc_spi3en (1 << 15) /* SPI3 clock enable */
+    // #define rcc_spi2en (1 << 14) /* SPI2 clock enable */
+    // #define rcc_wwdgen (1 << 11) /* Window watchdog clock enable */
+    // #define rcc_rtcapben (1 << 10) /* RTC APB clock enable (this bit is reserved for STM32L47x/L48x devices) */
+    // #define rcc_lcden (1 << 9) /* LCD clock enable (this bit is reserved for STM32L471/L4x5 devices) */
+    // #define rcc_tim7en (1 << 5) /* TIM7 timer clock enable */
+    // #define rcc_tim6en (1 << 4) /* TIM6 timer clock enable */
+    // #define rcc_tim5en (1 << 3) /* TIM5 timer clock enable */
+    // #define rcc_tim4en (1 << 2) /* TIM4 timer clock enable */
+    // #define rcc_tim3en (1 << 1) /* TIM3 timer clock enable */
+    // #define rcc_tim2en (1 << 0) /* TIM2 timer clock enable */
+    apb1en1_r: u32, /* APB1 Peripheral enable register 1. 0x58 */
+
+    // #define lptim2en (1 << 5) /*Low power timer 2 clock enable */
+    // #define swpmi1en (1 << 2) /* Single wire protocol clock enable */
+    // #define i2c4en (1 << 1) /* I2C4 clock enable (this bit is reserved for STM32L47x/L48x devices) */
+    // #define lpuart1en (1 << 0) /* Low power UART 1 clock enable */
+    apb1en2_r: u32, /* APB1 Peripheral enable register 2. 0x5C */
+
+    // #define rcc_syscfgen (1 << 0)
+    // #define rcc_fwen (1 << 7)
+    // #define rcc_sdmmc1en (1 << 10)
+    // #define rcc_tim1en (1 << 11)
+    // #define rcc_spi1en (1 << 12)
+    // #define rcc_tim8en (1 << 13)
+    // #define rcc_usart1en (1 << 14)
+    // #define rcc_tim15en (1 << 16)
+    // #define rcc_tim16en (1 << 17)
+    // #define rcc_tim17en (1 << 18)
+    // #define rcc_sai1en (1 << 21)
+    // #define rcc_sai2en (1 << 22)
+    // #define rcc_dfsdm1en (1 << 24)
+    apb2en_r: u32, /* APB2 Peripheral enable register.   0x60 */
+
+    reserved_6: u32, /* Not used. offset 0x64. */
+
+    ahb1smen_r: u32, /* 0x68 */
+    ahb2smen_r: u32, /* 0x6c */
+    ahb3smen_r: u32, /* 0x70 */
+
+    reserved_7: u32,
+
+    apb1smen_r1: u32, /* 0x78 */
+    apb1smen_r2: u32, /* 0x7c */
+    apb2smen_r: u32,  /* 0x80 */
+
+    reserved_8: u32,
+
+    ccip_r: u32, /* 0x88 */
+}
+
+static RCC_BASE: u32 = 0x40021000;
+
+pub struct Rcc {
+    mem: *mut RccMem,
+}
+
+#[derive(Clone, Copy)]
+pub enum GpioPortN {
+    A = 0,
+    B = 1,
+}
+
+impl Rcc {
+    pub fn enable_gpio_port(self: &mut Rcc, port: GpioPortN) -> () {
+        unsafe {
+            regset(&mut (*self.mem).ahb2en_r, 1 << (port as u32), 1);
+        }
+    }
+}
+
+pub fn get_rcc() -> Rcc {
+    Rcc {
+        mem: RCC_BASE as *mut RccMem,
+    }
+}