Mstar 平台（648）唤醒之串口唤醒

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我是靠谱客的博主正直大米，最近开发中收集的这篇文章主要介绍Mstar 平台（648）唤醒之串口唤醒，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

串口唤醒功能主要是从supernova 待机进入PM后，串口接收PC端口发送过来的特定字串，然后将主板唤醒的功能。与IR，KEYPAD，WOL，CEC，MHL 等等基本流程一致，触发源不一样而已。

待机前设置待机参数


pstPMCfg->stPMWakeCfg.bPmWakeEnableIR = TRUE;
pstPMCfg->stPMWakeCfg.bPmWakeEnableSAR = TRUE;
pstPMCfg->stPMWakeCfg.bPmWakeEnableGPIO0 = FALSE;
pstPMCfg->stPMWakeCfg.bPmWakeEnableGPIO1 = FALSE;
pstPMCfg->stPMWakeCfg.bPmWakeEnableUART1 = TRUE;

bPmWakeEnableUART1 设置为FALSE，开启该口的唤醒功能，然后EnterSleepMode里面设置到PM里面

vendormstarsupernovaprojectsmsrvcontrolsrcMSrv_Control_common.cpp
mapi_interface::Get_mapi_system()->PowerDown(&stPMCfg,bTrigger);

PM 开启相关参数

开启PM_WK_UART_EN

vendormstarpmzenoniaProjectMstarSourceConfigurationscusProj_config.h
//-----Uart Wakeup---
#ifndef PM_WK_UART_EN
#define PM_WK_UART_EN 1
#endif

开启串口，设置串口波特率

vendormstarpmzenoniaProjectMstarSourceConfigurationscusProj_config.h
vendormstarpmzenoniaProjectSourcecus_config.h
#define UART1_BAUDRATE
19200//38400//9600//38400
#define ENABLE_UART0
ENABLE

开启UART0 口，并设置串口波特率为19200(平台目前不支持115200)

设置UART口的寄存器CLK
vendormstarpmzenoniaProjectSourcecustomer.c

void Cus_Sys_ChangeUartForPllClk(U32 u32Mcu_Clk)
{
// Change MCU clock --> Change UART baud rate
#if ENABLE_UART0
ADCON |= 0x80;
S0RELL =
(UART_CLKREL(u32Mcu_Clk, UART0_BAUDRATE) & 0xff);
S0RELH = ((UART_CLKREL(u32Mcu_Clk, UART0_BAUDRATE) >> 8) & 0x3);
S0CON = 0x50;
PCON |= 0x80;
//S0BUF = (char)"*";
TI0=1;
#endif
#if ENABLE_UART1
S1RELL =
(UART1_CLKREL(u32Mcu_Clk, UART1_BAUDRATE) & 0xff);
S1RELH = ((UART1_CLKREL(u32Mcu_Clk, UART1_BAUDRATE) >> 8) & 0x3);
S1CON = 0x90;
// mode 1, 8-bit UART, enable receive
S1CON |= BIT1;
#endif
#if PM_WK_UART_EN
S1RELL =
(UART_CLKREL(u32Mcu_Clk, UART1_BAUDRATE) & 0xff);
S1RELH = ((UART_CLKREL(u32Mcu_Clk, UART1_BAUDRATE) >> 8) & 0x3);
S1CON = 0xd0;
PCON |= 0x80;
S1CON |= BIT1;
#endif
}

Cus_Sys_ChangeUartForPllClk 里面设置串口clk，配置好S1CON，PCON 否则后面无法获取到唤醒的字串。

设置唤醒字串
vendormstarpmzenoniaProjectMstarSourceCusProj_Inf.h

#if PM_WK_UART_EN
#define UART_WAKEUP_COMMAND
"mstar"
#define UART_RECEIVED_TIMEOUT
0xFFFF
#endif

UART_WAKEUP_COMMAND 设置唤醒字串。

循环监听

BOOLEAN CusProj_InfUart1Polling(void)
{
U8
u8UartWakeupCmd[32] = { 0 };
U32 u32UartRxCount
= 0;
U32 u32UartRxTimeout = 0;
if(strlen(UART_WAKEUP_COMMAND) == 0)
return TRUE;
while((u32UartRxTimeout < UART_RECEIVED_TIMEOUT) && (u32UartRxCount < strlen(UART_WAKEUP_COMMAND)))
{
//WriteByte(0x0EEC, ReadByte(0x0EEC)&(~BIT1));//swtich gpio_pm[5] to 51's uart_rx1 and gpio_pm[1] to 51's uart_tx1
//WriteByte(0x0EEC, ReadByte(0x0EEC)|(BIT0));//swtich gpio_pm[5] to 51's uart_rx1 and gpio_pm[1] to 51's uart_tx1
if (S1CON & BIT0)
// UART1 have received a ascii data
{
//printf("S1BUF = 0x%xn", S1BUF);
u8UartWakeupCmd[u32UartRxCount++] = S1BUF;
if(u32UartRxCount == strlen(UART_WAKEUP_COMMAND))
{
if (strcmp(u8UartWakeupCmd, UART_WAKEUP_COMMAND) == 0)
{
u32UartRxCount = 0;
return TRUE;
}
else
{
S1CON &= ~BIT0;
// clear received flag
return FALSE;
}
}
S1CON &= ~BIT0;
// clear received flag
}
u32UartRxTimeout++;
}
if (u32UartRxTimeout >= u32UartRxTimeout)
{
u32UartRxCount = 0;
memset(u8UartWakeupCmd, 0, 32);
u32UartRxTimeout = 0;
}
return FALSE;
}
void CusProj_InfUart1Isr(void)
{
if( Read2Byte(0x0F0A) & BIT8 )
//gpio_pm_5_fiq_final_status
{
if(CusProj_InfUart1Polling() == TRUE)
{
WriteByte(0x0E6B, (ReadByte(0x0E6B)&(~BIT1)));// disable swtich gpio_pm[5] to HK51's uart_rx1 and gpio_pm[1] to HK51's uart_tx1
MDrv_PM_PowerUp(PM_WKUP_UART);
WriteByte(0x0F0A, (ReadByte(0x0F0A))|(BIT6));
//clear
PAD_GPIO_PM5
WriteByte(0x0F0A, (ReadByte(0x0F0A))&(~BIT6));
WriteByte(0x0F0A, ReadByte(0x0F0A)&(~BIT7)); //gpio_pm_5_fiq_pol
WriteByte(0x0F0A, ReadByte(0x0F0A)|(BIT4));
//mask gpio_pm_5_fiq_mask
WriteByte(0x0F0A, ReadByte(0x0F0A)& ~(BIT0));// gpio_pm[5] is output enable
while(1);
}
else
{
WriteByte(0x0F0A, (ReadByte(0x0F0A))|(BIT6));
//clear
PAD_GPIO_PM5
WriteByte(0x0F0A, (ReadByte(0x0F0A))&(~BIT6));
}
}
}

CusProj_InfUart1Polling 中通过S1BUF不停读取字串，与唤醒字串匹配后，就开是唤醒

唤醒

MDrv_PM_PowerUp(PM_WKUP_UART);
INTERFACE void MDrv_PM_PowerUp(PM_WkupSrc eWkupSrc);
PM 唤醒源如下：
typedef enum
{
PM_WKUP_NONE
= 0,
///No wakeup event happens
PM_WKUP_IR
= 1,
///Wakeup event IR
PM_WKUP_DVI
= 2,
///Wakeup event DVI
PM_WKUP_DVI2
= 3,
///Wakeup event DVI2
PM_WKUP_CEC
= 4,
///Wakeup event CEC
PM_WKUP_SAR
= 5,
///Wakeup event SAR
PM_WKUP_ESYNC
= 6,
///Wakeup event ESYNC
PM_WKUP_SYNC
= 7,
///Wakeup event SYNC
PM_WKUP_RTC
= 8,
///Wakeup event RTC
PM_WKUP_RTC2
= 9,
///Wakeup event RTC2
PM_WKUP_AVLINK
= 10,///Wakeup event AVLINK
PM_WKUP_UART
= 11,
///Wakeup event UART
PM_WKUP_GPIO
= 12,
///Wakeup event GPIO
PM_WKUP_MHL
= 13, ///Wakeup event MHL
PM_WKUP_WOL
= 14
///Wakeup event WOL
//13~15: reserved
} PM_WkupSrc;

通过PM_WKUP_UART 事件唤醒。