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machine/stm32f4: refactor common code and add new build tag stm32f4 (#1332)

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* machine/STM32F4: break out STM32F4 machine with new build tag
This commit is contained in:
ardnew
2020-09-01 04:31:41 -05:00
committed by GitHub
parent 946184b8ba
commit 7f829fe153
8 changed files with 252 additions and 175 deletions
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src/machine/machine_stm32f407.go
+2 -68
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@@ -1,84 +1,18 @@
// +build stm32,stm32f407
// +build stm32f407
package machine
// Peripheral abstraction layer for the stm32f4(07)
// Peripheral abstraction layer for the stm32f407
import (
"device/stm32"
"runtime/interrupt"
"unsafe"
)
func CPUFrequency() uint32 {
return 168000000
}
func (p Pin) getPort() *stm32.GPIO_Type {
switch p / 16 {
case 0:
return stm32.GPIOA
case 1:
return stm32.GPIOB
case 2:
return stm32.GPIOC
case 3:
return stm32.GPIOD
case 4:
return stm32.GPIOE
case 5:
return stm32.GPIOF
case 6:
return stm32.GPIOG
case 7:
return stm32.GPIOH
case 8:
return stm32.GPIOI
default:
panic("machine: unknown port")
}
}
// enableClock enables the clock for this desired GPIO port.
func (p Pin) enableClock() {
switch p / 16 {
case 0:
stm32.RCC.AHB1ENR.SetBits(stm32.RCC_AHB1ENR_GPIOAEN)
case 1:
stm32.RCC.AHB1ENR.SetBits(stm32.RCC_AHB1ENR_GPIOBEN)
case 2:
stm32.RCC.AHB1ENR.SetBits(stm32.RCC_AHB1ENR_GPIOCEN)
case 3:
stm32.RCC.AHB1ENR.SetBits(stm32.RCC_AHB1ENR_GPIODEN)
case 4:
stm32.RCC.AHB1ENR.SetBits(stm32.RCC_AHB1ENR_GPIOEEN)
case 5:
stm32.RCC.AHB1ENR.SetBits(stm32.RCC_AHB1ENR_GPIOFEN)
case 6:
stm32.RCC.AHB1ENR.SetBits(stm32.RCC_AHB1ENR_GPIOGEN)
case 7:
stm32.RCC.AHB1ENR.SetBits(stm32.RCC_AHB1ENR_GPIOHEN)
case 8:
stm32.RCC.AHB1ENR.SetBits(stm32.RCC_AHB1ENR_GPIOIEN)
default:
panic("machine: unknown port")
}
}
// Enable peripheral clock
func enableAltFuncClock(bus unsafe.Pointer) {
switch bus {
case unsafe.Pointer(stm32.USART1):
stm32.RCC.APB2ENR.SetBits(stm32.RCC_APB2ENR_USART1EN)
case unsafe.Pointer(stm32.USART2):
stm32.RCC.APB1ENR.SetBits(stm32.RCC_APB1ENR_USART2EN)
case unsafe.Pointer(stm32.I2C1):
stm32.RCC.APB1ENR.SetBits(stm32.RCC_APB1ENR_I2C1EN)
case unsafe.Pointer(stm32.SPI1):
stm32.RCC.APB2ENR.SetBits(stm32.RCC_APB2ENR_SPI1EN)
}
}
//---------- UART related types and code
// UART representation