📄 lib.c
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#include "config.h"
void GPIOOutputMode(uint8 GPIOx, uint32 GPIOPins)
{
//IOxDIR = GPIOPins; 1--Output; 0--Input
//0xE0028008:IO0DIR的入口地址 --方向控制寄存器
(*((volatile unsigned long*)(0xE0028008 + 0x10 * GPIOx))) |= GPIOPins;
}
void GPIOInputMode(uint8 GPIOx, uint32 GPIOPins)
{
//IOxDIR = GPIOPins; 1--Output; 0--Input
//0xE0028008:IO0DIR的入口地址 --方向控制寄存器
(*((volatile unsigned long*)(0xE0028008 + 0x10 * GPIOx))) &= ~GPIOPins;
}
void GPIOSetBits(uint8 GPIOx, uint32 GPIOPins)
{
//IOxSET = GPIOPins;
//0xE0028004:IO0SET的入口地址 --置位寄存器
(*((volatile unsigned long*)(0xE0028004 + 0x10 * GPIOx))) = GPIOPins;
}
void GPIOResetBits(uint8 GPIOx, uint32 GPIOPins)
{
//IOxCLR = GPIOPins;
//0xE002800C:IO0CLR的入口地址 --复位寄存器
(*((volatile unsigned long*)(0xE002800C + 0x10 * GPIOx))) = GPIOPins;
}
//9-8日，下面这几个函数还没有经过测试
uint8 GPIOReadPin(uint8 GPIOx, uint32 GPIOPin)
{
//0xE0028000:IO0PIN的入口地址 --复位寄存器
return ((*((volatile unsigned long*)(0xE0028000 + 0x10 * GPIOx))) &GPIOPin) ? 1 : 0;
}
uint32 GPIOReadPort(uint8 GPIOx)
{
//0xE0028000:IO0PIN的入口地址 --复位寄存器
return (*((volatile unsigned long*)(0xE0028000 + 0x10 * GPIOx)));
}
void UARTxInit(uint8 UARTx, uint32 baud, UARTMODE set)
{
uint32 bak;
/*设置串行口波特率*/
(*((volatile unsigned char*)(0xE000C00C + UARTx * 0x4000))) |= DIVACCESSENABLE;
bak = (Fpclk >> 4) / baud;
//0xE000C00C --U0DLM
(*((volatile unsigned char*)(0xE000C004 + UARTx * 0x4000))) = bak >> 8;
//0xE000C00C --U0DLL
(*((volatile unsigned char*)(0xE000C000 + UARTx * 0x4000))) = (bak &0x00ff);
bak = set.datab - 5; //设置子长度
if (2 == set.stopb)
{
bak |= 0x04; //判断是否为2位停止位
}
if (0 != set.parity)
{
set.parity = set.parity - 1;
bak |= 0x08;
}
bak |= (set.parity << 4);
(*((volatile unsigned char*)(0xE000C00C + UARTx * 0x4000))) = bak;
}
void UARTxBaudSet(uint8 UARTx, uint32 BAUDRATE)
{
uint16 Fdiv;
//UARTx UxLCR控制寄存器--使能除数寄存器访问
//0xE000C00C --U0LCR
(*((volatile unsigned char*)(0xE000C00C + UARTx * 0x4000))) |= DIVACCESSENABLE;
//Fpclk为VPB时钟频率，可以位CCO频率的1~4倍
Fdiv = (Fpclk / 16) / BAUDRATE;
//0xE000C00C --U0DLM
(*((volatile unsigned char*)(0xE000C004 + UARTx * 0x4000))) = Fdiv >> 8;
//0xE000C00C --U0DLL
(*((volatile unsigned char*)(0xE000C000 + UARTx * 0x4000))) = (Fdiv &0x00ff);
//0xE000C00C --UxLCR --禁止访问除数控制寄存器
(*((volatile unsigned char*)(0xE000C00C + UARTx * 0x4000))) &= ~DIVACCESSENABLE;
}
void UARTxBitsSet(uint8 UARTx, uint8 Bits)
{
//0xE000C00C --U0LCR
//先将低位全部置0
(*((volatile unsigned char*)(0xE000C00C + UARTx * 0x4000))) &= ~0x11;
(*((volatile unsigned char*)(0xE000C00C + UARTx * 0x4000))) |= Bits;
}
//默认设置:8bits | 1 stop bits | no parity check | baud = 115200
void UARTxDefInit(uint8 UARTx)
{
uint16 Fdiv;
uint32 bak = 0;
//UARTx UxLCR控制寄存器--使能除数寄存器访问
//0xE000C00C --U0LCR
(*((volatile unsigned char*)(0xE000C00C + UARTx * 0x4000))) |= DIVACCESSENABLE;
//Fpclk为VPB时钟频率，可以位CCO频率的1~4倍
Fdiv = (Fpclk / 16) / BPS_9600;
//0xE000C00C --U0DLM
(*((volatile unsigned char*)(0xE000C004 + UARTx * 0x4000))) = Fdiv >> 8;
//0xE000C00C --U0DLL
(*((volatile unsigned char*)(0xE000C000 + UARTx * 0x4000))) = (Fdiv &0x00ff);
//0xE000C00C --UxLCR --禁止访问除数控制寄存器
(*((volatile unsigned char*)(0xE000C00C + UARTx * 0x4000))) &= ~DIVACCESSDISABLE;
bak |= BITS_8;
bak |= STOPBITS_1;
bak |= PARITYDISABLE;
(*((volatile unsigned char*)(0xE000C00C + UARTx * 0x4000))) = bak;
}
void UARTxEnable(uint8 UARTx)
{
//将功能选择位UARTx所需要的引脚设为第二功能
//(UART0:PINSEL0[1:0 & 3:2])
//(UART1:PINSEL0[17:16 & 19:18])
PINSEL0 |= (0x05 << (16 *UARTx));
}
void UARTxDisable(uint8 UARTx)
{
//将PINSEL0 的0~3位全部置0
PINSEL0 &= ~(0x0f << (16 *UARTx));
}
void UARTxSendByte(uint8 UARTx, uint8 data)
{
//发送数据0xE000C000----U0THR--发送保持寄存器--Tx FIFO的最高字节
(*((volatile unsigned char*)(0xE000C000 + UARTx * 0x4000))) = data;
//等待数据发送完毕0xE000C014----U0LSR--[5]为线状态寄存器的U0THR的状态
//THR位为空时，此位置位，THR写操作清零该位
while ((*((volatile unsigned char*)(0xE000C014 + UARTx * 0x4000))) &0x20 == 0)
{
//等待数据发送完毕
}
}
void UARTxSendStr(uint8 UARTx, uint8 const *str)
{
while (*str != '\0')
{
UARTxSendByte(UARTx, *str++);
}
}
void UARTxSendBufer(uint8 UARTx, uint8 data[8]) //经过测试
{
uint8 i;
for (i = 0; i < 8; i++)
{
UARTxSendByte(UARTx, data[i]);
}
while ((*((volatile unsigned char*)(0xE000C014 + UARTx * 0x4000))) &0x40 == 0)
;
}
void UARTxFIFOSendByte(uint8 UARTx, uint8 data)
{
//发送数据0xE000C000----U0THR--发送保持寄存器--Tx FIFO的最高字节
(*((volatile unsigned char*)(0xE000C000 + UARTx * 0x4000))) = data;
}
//目前只能处理uart0中断
void UARTxINTEnable(uint8 UARTx, uint8 CTRLx, uint32 irq_addr)
{
//0xE000C004--U0IER[0] --使能Rx数据可用中断DLAB=0
(*((volatile unsigned char*)(0xE000C004 + UARTx * 0x4000))) |= 0x01;
//(SPI0, I2C, UART1 和UART0 为IRQ => bit10, bit9, bit7 和bit6=0)
VICIntSelect &= (~(1 << 6));
//设置UART0所在的通道为IRQ中断//0x00000000;设置所有通道为IRQ中断//&= (~(1 << 6)); //bit6 = 0
//VICVectCntl0 = 0x20 | UART0IntID; //将UARTx中断通道分配到IRQ slot 0, 即优先级最高
(*((volatile unsigned long*)(0xFFFFF200 + CTRLx * 4))) = 0x20 | (UART0IntID + CTRLx);
//VICIntEnable |= (1 << 6); //使能UART0中断
//VICVectAddr0 = irq_addr;
(*((volatile unsigned long*)(0xFFFFF100 + CTRLx * 4))) = irq_addr;
}
void UARTxINTDisable(uint8 UARTx)
{
//0xE000C004--U0IER[0] --使能Rx数据可用中断DLAB=0
(*((volatile unsigned char*)(0xE000C004 + UARTx * 0x4000))) &= ~0x01;
}
void UARTxFIFOEnable(uint8 UARTx, uint8 BytesTrigger)
{
//0xE000C008----U0FCR
(*((volatile unsigned char*)(0xE000C008 + UARTx * 0x4000))) = 0x81;
}
void UARTxIntRegister(int addr){
}
void INTEnable(uint32 intSource){
}
void DataAddrBusEnable(void)
{
PINSEL2 = 0xF9800104; //0xE002c014;//0xE3E017E0;
/*(
(0x00 << 0) //保留
| (1 << 2) //P1.31:26用作调试端口，即DEBUG模式
| (0 << 3) //P1.25:16用作GPIO
| (0x00 << 4) //P2.7:0=D0:7----P1.0=CS0---P1.1=OE
//P3.31=BLS0
| (0 << 6) //使能P3.29
| (0 << 7) //使能P3.28
| (1 << 8) //使能WE
| (0x00 << 9) //保留
| (0 << 11) //使能P3.26
| (0 << 12) //保留
| (0 << 13) //使能P3.23
| (0x00 << 14) //使能P3.25
| (0x00 << 16) //使能P3.24
| (0x00 << 18) //保留
| (0 << 20) //使能P2.29:28
| (0 << 21) //使能P2.30
| (0 << 22) //使能P2.31
| (1 << 23) //A0用作地址线
| (1 < 24) //A1用作地址线
| (0x100 << 25) //A11:2为地址线
| (0x1111 << 28)
);*/
}
#define resetWR() GPIOResetBits(WR_PORT, WR)
#define setWR() GPIOSetBits(WR_PORT, WR)
#define setRD() GPIOSetBits(RD_PORT, RD)
#define resetRD() GPIOResetBits(RD_PORT, RD)
void writeSpc3(uint32 addr, uint8 data)
{
//采用的是绝对地址访问的方式
/*
volatile uint8 *ip;
unsigned char i = 100;
resetWR();
ip = GetAddr(addr);
ip[0] = data;
while(i --); //延时
setWR();
*/
//9-22日修改，将写数据更改为完全按照老大的时序来读写
/*步骤：
1.先将地址线及WR脚设为输出模式
2.设置VPC3为读无效模式(XRD = 1)
3.XWR = 1
4.向地址线上输出数据
5.设置数据线为输出数据IO
6.送出数据
7.XWR=0，触发VPC3的XREADY信号
8.检查XREADY信号，直到变低为止
9.产生上升沿，触发VPC3接受数据
*/
GPIOOutputMode(WR_PORT, WR);
GPIOOutputMode(RD_PORT, RD);
GPIOOutputMode(VPC3ADDR_PORT, VPC3ADDR);
GPIOOutputMode(VPC3DATA_PORT, VPC3DATA);
GPIOInputMode(XREADY_PORT, XREADY);
setRD();
setWR();
{
//输出地址【有待优化，先进行测试】
uint16 addr_bit;
for (addr_bit = 0; addr_bit < 16; addr_bit++)
{
if (addr &(1 << addr_bit))
{
GPIOSetBits(VPC3ADDR_PORT, 1 << addr_bit);
}
else
{
GPIOResetBits(VPC3ADDR_PORT, 1 << addr_bit);
}
}
}
{
//输出数据【有待优化，先进行测试】
uint16 data_bit;
for (data_bit = 0; data_bit < 8; data_bit++)
{
if (data &(1 << data_bit))
{
GPIOSetBits(VPC3DATA_PORT, 1 << data_bit);
}
else
{
GPIOResetBits(VPC3DATA_PORT, 1 << data_bit);
}
}
}
resetWR();
while ((GPIOReadPin(XREADY_PORT, XREADY)))
;
setWR();
}
uint8 readSpc3(uint32 addr)
{
//采用的是绝对地址访问的方式
/*
uint8 result;
volatile uint8 *ip;
uint16 i = 500;
resetRD();
ip = GetAddr(addr);
result = ip[0];
while(i --); //延时
setRD();
return ip[0];
*/
//9-22日修改，将写数据更改为完全按照老大的时序来读写
/*步骤：
1.设置XRD为读使能输出IO
2.XRD=1
3.设置VPC3为写无效状态(XWR=1)
4.设置数据口为数据输入IO
5.向地址线输出地址
6.XRD=0，产生下降沿，触发VPC3的XREADY信号
7.检查XREADY信号，直到XREADY变为低为止
8.读取数据
9.XRD=1，产生上升沿，触发SPC3的XREADY信号
10.将数据返回
*/
uint8 result = 0x00;
GPIOOutputMode(WR_PORT, WR);
GPIOOutputMode(RD_PORT, RD);
GPIOOutputMode(VPC3ADDR_PORT, VPC3ADDR);
GPIOInputMode(VPC3DATA_PORT, VPC3DATA);
GPIOInputMode(XREADY_PORT, XREADY);
setRD();
setWR();
{
//输出地址【有待优化，先进行测试】
uint16 addr_bit;
for (addr_bit = 0; addr_bit < 16; addr_bit++)
{
if (addr &(1 << addr_bit))
{
GPIOSetBits(VPC3ADDR_PORT, 1 << addr_bit);
}
else
{
GPIOResetBits(VPC3ADDR_PORT, 1 << addr_bit);
}
}
}
resetRD();
while ((GPIOReadPin(XREADY_PORT, XREADY)))
;
result = GPIOReadPort(VPC3DATA_PORT) &0xff;
return result;
}
void SPC3Reset(void)
{
GPIOOutputMode(RST_PORT, RST);
GPIOSetBits(RST_PORT, RST); //将RST引脚拉高
//VPC3+ requires a minimum reset phase of 100 ns at power-on.
{
unsigned char i = 100;
while (i--)
;
}
GPIOResetBits(RST_PORT, RST); //将RST引脚置低
}
/*在os_cpu_c.c中已经定义过了
void SWI_Exception(int SWI_Num, int *Regs)
{
switch (SWI_Num)
{
//case 0x00: //任务切换函数OS_TASK_SW，参考os_cpu_s.s文件 /
// break;
//case 0x01: // 启动任务函数OSStartHighRdy，参考os_cpu_s.s文件 /
// break;
case 0x02:
// 关中断函数OS_ENTER_CRITICAL()，参考os_cpu.h文件
__asm
{
MRS R0, SPSR
ORR R0, R0,#NoInt
MSR SPSR_c, R0
}
break;
case 0x03:
//开中断函数OS_EXIT_CRITICAL()，参考os_cpu.h文件
__asm
{
MRS R0, SPSR
BIC R0, R0,# NoInt
MSR SPSR_c, R0
}
break;
default:
break;
}
}
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