根据新唐M0的M0516LAN的SIM900A的驱动测验
元旦放假，急于赶一个小项目，做了一个M0516LAN驱动SIM900A的测验。第一次用SIM900A，其间遇到几个小问题，调了良久，也问过群里用过SIM900A的几位朋友才调通，在此感谢。最弱智的问题是我把NRESET接到了PWM3上，然后又发动了PWM3，尽管后边把P43置成IO输出却不成功，然后多半晚上就那么悲惨剧掉了。新唐的库是置成了复用功用再想置回IO，需求先DrvGPIO_InitFunction(E_FUNC_GPIO);才干装备IO功用的。我后来仍是不发动PWM就通过了开机进程。只需SIM900A开机了，NETLIGHT的LED就会闪耀，不论有没有SIM卡。别的，一切SIM900A的AT指令都是以“”完毕的。
“sim900a.c ”文件源码如下：
#include
#include
#include “DriverDrvUART.h”
#include “DriverDrvGPIO.h”
#include “DriverDrvSYS.h”
#define PWRKEY E_PORT2, E_PIN1
#define NRESETE_PORT4, E_PIN3
#define STATUS E_PORT2, E_PIN3
#define RIE_PORT3, E_PIN2
#define CTSE_PORT0, E_PIN0
/*
_________________________________________________
|M0516LANSIM900A|
||
|P21PWRKEY—->PWRKEY|
|P43NRESET—->NRESET|
|P23STATUS<----STATUS|
|P32RI<----RI|
|P00CTS1<----CTS|
|P13TXD1—->RXD|
|P12RXD1<----TXD|
|_______________________________________________|
*/
int UART1_init(void)
{
STR_UART_T sParam;
/* Set UART1 Pin */
DrvGPIO_InitFunction(E_FUNC_UART1);
//outpw(&SYS->P1_MFP, (inpw(&SYS->P1_MFP) | (0x3<<10)) & ~(0x3<<2));
//outpw(&SYS->P0_MFP, (inpw(&SYS->P0_MFP) | (0x3<<8)) & ~(0x3<<0));
/* Select UART1 Clock Source From 12Mhz*/
DrvSYS_SelectIPClockSource(E_SYS_UART_CLKSRC,0);
/* UART1 Setting */
sParam.u32BaudRate = 9600;
sParam.u8cDataBits = DRVUART_DATABITS_8;
sParam.u8cStopBits = DRVUART_STOPBITS_1;
sParam.u8cParity = DRVUART_PARITY_NONE;
sParam.u8cRxTriggerLevel= DRVUART_FIFO_1BYTES;
if(DrvUART_Open(UART_PORT1,&sParam) != E_SUCCESS)
{
printf(“UART1 open failed”);
return FALSE;
}
/* Enable Interrupt and install the call back function */
//DrvUART_EnableInt(UART_PORT1, (DRVUART_RLSINT | DRVUART_RDAINT),UART1_INT_HANDLE);
/* Disable Interrupt */
//DrvUART_DisableInt(UART_PORT1,DRVUART_RLSINT | DRVUART_THREINT | DRVUART_RDAINT);
return TRUE;
}
int SIM900A_Open(void)
{
int dly;
DrvGPIO_ClrBit(PWRKEY);
for(dly=0;dly<2000;dly++)DrvSYS_Delay(1000); //delay 1S
DrvGPIO_SetBit(PWRKEY);
for(dly=0;dly<3000;dly++)DrvSYS_Delay(1000); //delay 3S
if(DrvGPIO_GetBit(STATUS))
{
printf(“SIM900A Open Success!!!”);
return 1;
}
else
{
printf(“SIM900A Open Failure!!!”);
return 0;
}
}
int SIM900A_Close(void)
{
int dly;
DrvGPIO_ClrBit(PWRKEY);
for(dly=0;dly<6000;dly++)DrvSYS_Delay(1000); //delay 1S-5S
DrvGPIO_SetBit(PWRKEY);
for(dly=0;dly<4000;dly++)DrvSYS_Delay(1000); //delay 2S
if(DrvGPIO_GetBit(STATUS))
{
printf(“SIM900A Close Failure!!!”);
return 1;
}
else
{
printf(“SIM900A Close Success!!!”);
return 0;
}
}
int SIM900A_Reset(void)
{
int dly;
DrvGPIO_ClrBit(NRESET);
DrvSYS_Delay(100); //delay 20uS-50uS
DrvGPIO_SetBit(NRESET);
for(dly=0;dly<2000;dly++)DrvSYS_Delay(1000); //delay 2S
if(DrvGPIO_GetBit(STATUS)==1)
return 1;
else
return 0;
}
int SIM900A_init(void)
{
int ret =0;
DrvGPIO_Open(STATUS, E_IO_INPUT);
DrvGPIO_Open(RI, E_IO_INPUT);
DrvGPIO_Open(CTS, E_IO_INPUT);
DrvGPIO_Open(PWRKEY, E_IO_OUTPUT);
DrvGPIO_Open(NRESET, E_IO_OUTPUT);
DrvGPIO_SetBit(PWRKEY);
DrvGPIO_SetBit(NRESET);
ret = SIM900A_Open();
UART1_init();
return ret;
}
