disable a peripheral clock run error

[9218sky]

1. disable clock code as follow:

    LPC_CCU2->CLKCCU[CLK_APLL - CLK_CCU2_START].CFG  &= ~1;

2. MCU as LPC1833, source code referrence "lpcopen_2_12_keil_iar_keil_mcb_1857, chip_clock.h" line 226

3. this test project on "lpcopen_2_12_keil_iar_keil_mcb_1857\applications\lpc18xx_43xx\keil_uvision_projects\keil_mcb_1857\periph\periph_systick"

thank.

[kerryzhou]

Hi 9218 sky,

    LPCopen 2.12 is too old, please download the newest lpcopen3_01 from this link:

http://www.nxp.com/assets/downloads/data/en/software/lpcopen_3_01_keil_iar_keil_mcb_1857.zip 

I have run it on my side, after I run over:

LPC_CCU2->CLKCCU[CLK_APLL - CLK_CCU2_START].CFG  &= ~1;

No error happens, it works ok on my side with lpcopen 3_01

Please take care,  when you debug the chip, please comment:

    __WFI();

Otherwise, the chip will enter in the low power mode, it will lost the power in debug mode.

This is very important.

Have a great day,
Kerry

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[9218sky]

Hi, Kerry

     perform code as follow:

 LPC_CGU->BASE_CLK[CLK_BASE_SDIO]     |= 1; 
 LPC_CGU->BASE_CLK[CLK_BASE_SSP0]     |= 1;
 LPC_CGU->BASE_CLK[CLK_BASE_SSP1]     |= 1;
 LPC_CGU->BASE_CLK[CLK_BASE_UART0]   |= 1;
 LPC_CGU->BASE_CLK[CLK_BASE_UART1]   |= 1;
 LPC_CGU->BASE_CLK[CLK_BASE_UART2]   |= 1;
 LPC_CGU->BASE_CLK[CLK_BASE_UART3]   |= 1;
 LPC_CGU->BASE_CLK[CLK_BASE_APLL]      |= 1;

   problom still  existence, and no insert DEBUG, the code run on  lpcopen3_01.

can you test the code,  please.

thanks.

[kerryzhou]

Hi 9218 sky,

   Thank you for your updated information.

   You said, no DEBUG, and problem still exist.

    Please give me more detail, what the problem you are meeting? In your top post, I think you are entering some error while debugging. So please tell me how you find the problem, what the problem you are meeting with the BASE clock configuration?

   Waiting for your details.

Have a great day,
Kerry

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[9218sky]

Hi kerry

problem generation from "systick" project main file add some close base-clock code only.
IDE for MDK51X
MCU LPC1833JDB144(I designe small system board)

1. sample pack "lpcopen_3_01_keil_iar_keil_mcb_1857"

2. edit peripheral "lpcopen_3_01_keil_iar_keil_mcb_1857\LPC43xx_18xx\prj_mcb1857\keil\periph_systick"
main file, as follow:

int main(void)
{
LPC_CGU->BASE_CLK[CLK_BASE_SDIO] |= 1; //SN.13
LPC_CGU->BASE_CLK[CLK_BASE_SSP0] |= 1; //SN.14
LPC_CGU->BASE_CLK[CLK_BASE_SSP1] |= 1; //SN.15
LPC_CGU->BASE_CLK[CLK_BASE_UART0] |= 1; //SN.16
LPC_CGU->BASE_CLK[CLK_BASE_UART1] |= 1; //SN.17
LPC_CGU->BASE_CLK[CLK_BASE_UART2] |= 1; //SN.18
LPC_CGU->BASE_CLK[CLK_BASE_UART3] |= 1; //SN.19
SystemCoreClockUpdate();
Board_Init();

/* Enable and setup SysTick Timer at a periodic rate */
SysTick_Config(SystemCoreClock / TICKRATE_HZ);

while (1) {
__WFI();
}
}

3. other file not change!

4. build the project and debug, MDK display as follow:

best regard!

sky9218

[kerryzhou]

Hi 9218 sky,

     Thank you for your more details.

     I have tried the MDK systick project on my side, that's really strange for the MDK IDE. In the MDK IDE project debug mode, I have reflect your problem.

     But, I find the blinky project which is the same source code as systick, this project don't have problem.

    Besides, when I use the IAR project, both blink and systick ,  and in debug mode, no problem happens.

The code you can used like me:

int main(void)
{
SystemCoreClockUpdate();
Board_Init();
LPC_CGU->BASE_CLK[CLK_BASE_SDIO] |= 1; //SN.13
LPC_CGU->BASE_CLK[CLK_BASE_SSP0] |= 1; //SN.14
LPC_CGU->BASE_CLK[CLK_BASE_SSP1] |= 1; //SN.15
LPC_CGU->BASE_CLK[CLK_BASE_UART0] |= 1; //SN.16
LPC_CGU->BASE_CLK[CLK_BASE_UART1] |= 1; //SN.17
LPC_CGU->BASE_CLK[CLK_BASE_UART2] |= 1; //SN.18
LPC_CGU->BASE_CLK[CLK_BASE_UART3] |= 1; //SN.19    
/*
Chip_Clock_DisableBaseClock(CLK_BASE_SDIO);
Chip_Clock_DisableBaseClock(CLK_BASE_SSP0);
Chip_Clock_DisableBaseClock(CLK_BASE_SSP1);
Chip_Clock_DisableBaseClock(CLK_BASE_UART0);
    Chip_Clock_DisableBaseClock(CLK_BASE_UART1);
    Chip_Clock_DisableBaseClock(CLK_BASE_UART2);
    Chip_Clock_DisableBaseClock(CLK_BASE_UART3);
*/

SysTick_Config(SystemCoreClock / TICKRATE_HZ);

while (1) {
//__WFI();// in debug mode, must comment
}

}

You can try the blink project, or the IAR according project on your side.

Your problem should caused by the systick MDK project creation. Chip function have no problem.

Wish it helps you!

Have a great day,
Kerry

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