//balmer spi test
#include "hw_config.h"
#include <stdbool.h>

uint8_t spi_transmit(uint8_t out)
{
	uint16_t data = 0;
	SPI_I2S_SendData(SPI1, out);
	while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET)
		;
 
	if (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == SET) {
		data = SPI_I2S_ReceiveData(SPI1);
	}

	return (uint8_t)data;
}

void spi_select(bool on)
{
	GPIO_WriteBit(GPIOA, GPIO_Pin_2, (!on)?Bit_SET:Bit_RESET);
}

void spi_test(void)
{
	uint32_t i;
	uint8_t out;
	GPIO_InitTypeDef GPIO_InitStructure;
	SPI_InitTypeDef SPI_InitStructure;
	GPIO_StructInit(&GPIO_InitStructure);

	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
	GPIO_Init(GPIOA, &GPIO_InitStructure);

	RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
//	GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_SPI1);
//	GPIO_PinAFConfig(GPIOA, GPIO_PinSource5, GPIO_AF_SPI1);
//	GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_SPI1);

	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_5;
	GPIO_Init(GPIOA, &GPIO_InitStructure);

	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
	GPIO_Init(GPIOA, &GPIO_InitStructure);
	

	SPI_StructInit(&SPI_InitStructure);

	SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
	SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
	//SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
	SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
	SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
	//SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
	
	SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
	SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_128;
	SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
	SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
	SPI_Init(SPI1, &SPI_InitStructure);
	SPI_Cmd(SPI1, ENABLE);

	SPI_NSSInternalSoftwareConfig(SPI1, SPI_NSSInternalSoft_Set);

	while(1)
	{
		USB_SetLeds('0');
		for (i=0; i<0x000ffff; i++);
		USB_SetLeds('A');
		spi_select(true);
		//for (i=0; i<0x000fff; i++);
		//for (i=0; i<0x000fff; i++)
		//	spi_transmit(0b1001111);
		spi_transmit(0b10001111);
		USB_SetLeds('B');
		out = spi_transmit(0);
		USB_SetLeds('C');
		spi_select(false);
		USB_SetLeds('D');
		for (i=0; i<0x000ffff; i++);
	}
}