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moved source files around in preparation to adding makefile build way

Browse source 
added makefile (thx gke)
added linker script (thx gke)
moved startups into src directory as well
no code changes.

git-svn-id: https://afrodevices.googlecode.com/svn/trunk/baseflight@105 7c89a4a9-59b9-e629-4cfe-3a2d53b20e61
This commit is contained in:
timecop 2012-03-06 04:41:23 +00:00
parent aae8ef4c3d
commit 5091f3e9ff
45 changed files with 229 additions and 14182 deletions
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147
src/drv_uart.c Executable file
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#include "board.h"
/*
DMA UART routines idea lifted from AutoQuad
Copyright © 2011 Bill Nesbitt
*/
#define UART_BUFFER_SIZE 256
// Receive buffer, circular DMA
volatile uint8_t rxBuffer[UART_BUFFER_SIZE];
uint32_t rxDMAPos = 0;
volatile uint8_t txBuffer[UART_BUFFER_SIZE];
uint32_t txBufferTail = 0;
uint32_t txBufferHead = 0;
static void uartTxDMA(void)
{
DMA1_Channel4->CMAR = (uint32_t)&txBuffer[txBufferTail];
if (txBufferHead > txBufferTail) {
DMA1_Channel4->CNDTR = txBufferHead - txBufferTail;
txBufferTail = txBufferHead;
} else {
DMA1_Channel4->CNDTR = UART_BUFFER_SIZE - txBufferTail;
txBufferTail = 0;
}
DMA_Cmd(DMA1_Channel4, ENABLE);
}
void DMA1_Channel4_IRQHandler(void)
{
DMA_ClearITPendingBit(DMA1_IT_TC4);
DMA_Cmd(DMA1_Channel4, DISABLE);
if (txBufferHead != txBufferTail)
uartTxDMA();
}
void uartInit(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
// UART
// USART1_TX PA9
// USART1_RX PA10
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// DMA TX Interrupt
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel4_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);
// Receive DMA into a circular buffer
DMA_DeInit(DMA1_Channel5);
DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&USART1->DR;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)rxBuffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
DMA_InitStructure.DMA_BufferSize = UART_BUFFER_SIZE;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_Init(DMA1_Channel5, &DMA_InitStructure);
DMA_Cmd(DMA1_Channel5, ENABLE);
USART_DMACmd(USART1, USART_DMAReq_Rx, ENABLE);
rxDMAPos = DMA_GetCurrDataCounter(DMA1_Channel5);
// Transmit DMA
DMA_DeInit(DMA1_Channel4);
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&USART1->DR;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
DMA_Init(DMA1_Channel4, &DMA_InitStructure);
DMA_ITConfig(DMA1_Channel4, DMA_IT_TC, ENABLE);
DMA1_Channel4->CNDTR = 0;
USART_DMACmd(USART1, USART_DMAReq_Tx, ENABLE);
USART_Cmd(USART1, ENABLE);
}
uint16_t uartAvailable(void)
{
return (DMA_GetCurrDataCounter(DMA1_Channel5) != rxDMAPos) ? true : false;
}
uint8_t uartRead(void)
{
uint8_t ch;
ch = rxBuffer[UART_BUFFER_SIZE - rxDMAPos];
// go back around the buffer
if (--rxDMAPos == 0)
rxDMAPos = UART_BUFFER_SIZE;
return ch;
}
uint8_t uartReadPoll(void)
{
while (!uartAvailable()); // wait for some bytes
return uartRead();
}
void uartWrite(uint8_t ch)
{
txBuffer[txBufferHead] = ch;
txBufferHead = (txBufferHead + 1) % UART_BUFFER_SIZE;
// if DMA wasn't enabled, fire it up
if (!(DMA1_Channel4->CCR & 1))
uartTxDMA();
}
void uartPrint(char *str)
{
while (*str)
uartWrite(*(str++));
}