Thanks Ricardo for your reply.
Your code above doesn't seem to be working for both LPC11U68 development board and my board in which there is a LPC11U68 chip. I checked whether it appeared as a Mass Storage Class (MSC) device or not.
See an example picture below which shows I could go into the ISP mode by pressing the switch(PIO0_1 pin) and by applying power to the board (Resetting the board). The idea is that my PC application would access CRP DISABLD (E:) drive and replace it with a newer firmware. This way, we could update the firmware in the field. Our product won't have any button, that's why I would like to go into the ISP mode at the runtime when I get a command from the PC application.
Do you have any other suggestion for the field firmware update?
Can you update the firmware by using Tera Term or Flash Magic?
When I ran your code, it appeared as follows instead of the picture above.
My code below seems to be working if I comment out the line, LPC_IOCON->PIO0[3] &= (1 << 0);.
However, with LPC11U68 development board it seems to be working no matter that I comment out that line or not.
#include <board.h>
#define POWER_CON_SYSOSC (1<<5) /*register value to enable the power to system oscillator*/
#define BYPASS 1 /*register value to set Bypass system oscillator*/
#define FREQRANGE (1<<1) /*register value to determin frequency range for low-power oscillator*/
#define PLL_CTRL_CONFIG 0x23 /*register value to configure the PLL*/
#define PLL_ON ~(1<<7) /*register value to enable the PLL*/
#define PLL_LOCK 0x01 /*register value to lock the PLL*/
#define CLK_SEL_PLLOUT 3 /*register value to set the main system clock to the output of the pll*/
#define GPIO_CLK_EN (1<<6) /*register value to enable the clock signal to GPIO block*/
#define IOCON_CLK_EN (1<<16) /*register value to enable the clock signal to IOCON block*/
#define TIMERS_CLK_EN (0xF<<7) /*register value to enable the clock signal to all timers*/
#define UART_CLK_EN (1<<12) /*register value to enable the clock signal to UART block*/
#define PINT_CLK_EN (1<<19) /*register value to enable the clock signal to pin interrupt block*/
#define SSP0_CLK_EN (1<<11) /*register value to enable the clock signal to SSP0 block*/
#define SSP1_CLK_EN (1<<18) /*register value to enable the clock signal to SSP1 block*/
#define ADC_CLK_EN (1<<13) /*register value to enable the clock signal to ADC block*/
#define USB_CLK_EN (1<<14) /*register value to enable the clock signal to USB block*/
#define PIO0_17_D5_LED (1<<17) /*register value for the control bit for PIO0_17 pin*/
#define CLR_PIN_CONFIG 0x00000000 /*value to clear a pin's IOCON register*/
#define PULL_UP_EN (0x02<<3) /*register value used to set a GPIO pin to have an internal pull up resistor*/
#define USB_VBUS (1<<0) /*register value to configure pin as USB VBUS*/
#define PULL_UP_PULL_DOWN_INACTIVE ~(3<<3) /*register value to configure pin so that the internal pull-up/pull-down resistors are not active*/
int main(void) {
// System clock settings
LPC_SYSCTL->PDRUNCFG &= ~(POWER_CON_SYSOSC); ///Power-up System Osc
LPC_SYSCTL->PDRUNCFG &= ~(1<<4); /*ADC powered*/
LPC_SYSCTL->SYSOSCCTRL &= ~(BYPASS); /*system oscillator control register: Oscillator is not bypassed, frequency range is 1 - 20 MHz*/
LPC_SYSCTL->SYSOSCCTRL &= ~(FREQRANGE);
/*configure pll to give 48MHz clock output*/
LPC_SYSCTL->SYSPLLCTRL = PLL_CTRL_CONFIG;
LPC_SYSCTL->PDRUNCFG &= PLL_ON;
/*wait for pll lock*/
while(!(LPC_SYSCTL->SYSPLLSTAT & PLL_LOCK))
{
/*do nothing*/
}
/*connect main clock to pll output*/
LPC_SYSCTL->MAINCLKSEL |= CLK_SEL_PLLOUT;
LPC_SYSCTL->MAINCLKUEN = FALSE; /*Toggle enable for setting to take effect*/
LPC_SYSCTL->MAINCLKUEN = TRUE;
/*enable clock to required peripherals*/
g_systemControl->SYSAHBCLKCTRL |= IOCON_CLK_EN ///enable clock to IOCON
| USB_CLK_EN ///enable clock to USB
| GPIO_CLK_EN ///enable clock to GPIO
| TIMERS_CLK_EN ///enable clock to timers
| PINT_CLK_EN ///enable clock to pin interrupts
| SSP0_CLK_EN ///enable clock to SSP0
| ADC_CLK_EN; ///enable clock to ADC
//GPIO settings
LPC_IOCON->PIO0[1] &= 0;
LPC_IOCON->PIO0[1] |= (0x02<<3); /*internal pull up resistor*/
/// USB_VBUS config
LPC_IOCON->PIO0[3] |= (1 << 0); /// Set up of PIO0_3 register to USB_VBUS
LPC_IOCON->PIO0[3] &= (1 << 0); /// and inactive pull-up/pull-down resistors
LPC_GPIO->DIR[0] |= PIO0_17_D5_LED; /// Port 0 - pin 17 LED
while(1) {
LPC_GPIO->SET[0] |= PIO0_17_D5_LED; /*Pin high initially so LEDs are On*/
for (int j = 0; j < 1000000; j++)
{
}
LPC_GPIO->CLR[0] |= PIO0_17_D5_LED; /*Pin low so LEDs are off*/
for (int j = 0; j < 1000000; j++)
{
}
Chip_IAP_ReinvokeISP();
}
}
Thanks for your help.
David
Hi David,
First I'd like to ask you if you tried my code modifying the LPC project I mentioned, or if you just tried the main function alone (this is because in the code I put on my first answer, the system initialization is made inside the "Generic Initialization" functions which were generated with the LPC Project).
Also, I tried the code that you used, and I was able to get the board to enter ISP mode even with all the delays you used and with the line LPC_IOCON->PIO0[3] &= (1 << 0). For that I just changed the g_systemControl->SYSAHBCLKCTRL for LPC_SYSCTL->SYSAHBCLKCTRL when you enable the clock:
#include <board.h>
#define POWER_CON_SYSOSC (1<<5) /*register value to enable the power to system oscillator*/
#define BYPASS 1 /*register value to set Bypass system oscillator*/
#define FREQRANGE (1<<1) /*register value to determin frequency range for low-power oscillator*/
#define PLL_CTRL_CONFIG 0x23 /*register value to configure the PLL*/
#define PLL_ON ~(1<<7) /*register value to enable the PLL*/
#define PLL_LOCK 0x01 /*register value to lock the PLL*/
#define CLK_SEL_PLLOUT 3 /*register value to set the main system clock to the output of the pll*/
#define GPIO_CLK_EN (1<<6) /*register value to enable the clock signal to GPIO block*/
#define IOCON_CLK_EN (1<<16) /*register value to enable the clock signal to IOCON block*/
#define TIMERS_CLK_EN (0xF<<7) /*register value to enable the clock signal to all timers*/
#define UART_CLK_EN (1<<12) /*register value to enable the clock signal to UART block*/
#define PINT_CLK_EN (1<<19) /*register value to enable the clock signal to pin interrupt block*/
#define SSP0_CLK_EN (1<<11) /*register value to enable the clock signal to SSP0 block*/
#define SSP1_CLK_EN (1<<18) /*register value to enable the clock signal to SSP1 block*/
#define ADC_CLK_EN (1<<13) /*register value to enable the clock signal to ADC block*/
#define USB_CLK_EN (1<<14) /*register value to enable the clock signal to USB block*/
#define PIO0_17_D5_LED (1<<17) /*register value for the control bit for PIO0_17 pin*/
#define CLR_PIN_CONFIG 0x00000000 /*value to clear a pin's IOCON register*/
#define PULL_UP_EN (0x02<<3) /*register value used to set a GPIO pin to have an internal pull up resistor*/
#define USB_VBUS (1<<0) /*register value to configure pin as USB VBUS*/
#define PULL_UP_PULL_DOWN_INACTIVE ~(3<<3) /*register value to configure pin so that the internal pull-up/pull-down resistors are not active*/
int main(void)
{
// System clock settings
LPC_SYSCTL->PDRUNCFG &= ~(POWER_CON_SYSOSC); ///Power-up System Osc
LPC_SYSCTL->PDRUNCFG &= ~(1<<4); /*ADC powered*/
LPC_SYSCTL->SYSOSCCTRL &= ~(BYPASS); /*system oscillator control register: Oscillator is not bypassed, frequency range is 1 - 20 MHz*/
LPC_SYSCTL->SYSOSCCTRL &= ~(FREQRANGE);
/*configure pll to give 48MHz clock output*/
LPC_SYSCTL->SYSPLLCTRL = PLL_CTRL_CONFIG;
LPC_SYSCTL->PDRUNCFG &= PLL_ON;
/*wait for pll lock*/
while(!(LPC_SYSCTL->SYSPLLSTAT & PLL_LOCK))
{
/*do nothing*/
}
/*connect main clock to pll output*/
LPC_SYSCTL->MAINCLKSEL |= CLK_SEL_PLLOUT;
LPC_SYSCTL->MAINCLKUEN = FALSE; /*Toggle enable for setting to take effect*/
LPC_SYSCTL->MAINCLKUEN = TRUE;
/*enable clock to required peripherals*/
LPC_SYSCTL->SYSAHBCLKCTRL |= IOCON_CLK_EN ///enable clock to IOCON
| USB_CLK_EN ///enable clock to USB
| GPIO_CLK_EN ///enable clock to GPIO
| TIMERS_CLK_EN ///enable clock to timers
| PINT_CLK_EN ///enable clock to pin interrupts
| SSP0_CLK_EN ///enable clock to SSP0
| ADC_CLK_EN; ///enable clock to ADC
//GPIO settings
LPC_IOCON->PIO0[1] &= 0;
LPC_IOCON->PIO0[1] |= (0x02<<3); /*internal pull up resistor*/
/// USB_VBUS config
LPC_IOCON->PIO0[3] |= (1 << 0); /// Set up of PIO0_3 register to USB_VBUS
LPC_IOCON->PIO0[3] &= (1 << 0); /// and inactive pull-up/pull-down resistors
LPC_GPIO->DIR[0] |= PIO0_17_D5_LED; /// Port 0 - pin 17 LED
while(1)
{
for (int j = 0; j < 1000000; j++);
LPC_GPIO->SET[0] |= PIO0_17_D5_LED; /*Pin high initially so LEDs are On*/
for (int j = 0; j < 1000000; j++);
LPC_GPIO->CLR[0] |= PIO0_17_D5_LED; /*Pin low so LEDs are off*/
for (int j = 0; j < 1000000; j++);
Chip_IAP_ReinvokeISP();
}
}Regarding the use of Flash Magic, you can indeed use it to update the firmware. With respect to TeraTerm, I just mentioned it because you can use it (just like the terminal that Flash Magic has) to send the "?" that allows you to have the ISP Synchronization. With this you can confirm that your board has entered ISP mode:
It is important to mention that I used the LPC11U68 evaluation board (OM13058) with only the JP2 jumpers connected.
I hope this information can help you.
Ricardo Delsordo.
Hi David,
1. It is possible to enter ISP mode during run time. In order for the computer to recognize the board as a MSC device, pin P0_3 must be high when calling Reinvoke ISP just like it shows in the following booting flow chart:
2. If you want to use USB ISP then you don't need to use Flash Magic and neither a USB-RS232 cable. When you are in USB ISP mode you can easily drag and drop your new firmware to the MSC device in your PC. Please consider that when using USB ISP, the user code valid signature must be either part of the vector table, or the axf (or binary) file must be post-processed to insert the checksum.
Regarding your second question from this point, it's possible, but your application in the MCU will need to recognize this command in order to call the function Re-Invoke ISP.
3. Thank you so much for clarifying this. I've already checked on my side, and when I call Reinvoke ISP and have P0_3 high I'm able to see the LPC as a MSC device (CRP DISABLD).
4. The delays shouldn't affect the ISP mode at all. You have to keep in mind that when you call the function Reinvoke ISP your pin P0_3 has to be high. For the development board OM13058, this pin is connected to VBUS on the J3 connector, so when you connect a cable to this connector this pin goes to high immediately. Please check this connection on your board.
5. Since you want to use USB_ISP, the use of Flash Magic is no longer necessary. Flash Magic is a good tool only when you want to use I2C_ISP, SPI_ISP or UART_ISP.
I hope this can answer your questions.
Best Regards,
Ricardo Delsordo
Thank you very much, Ricardo. Much appreciated. Your response is really helpful.
I have further questions following your answers.
It is good to know that it is possible to enter ISP mode during run time.
My following question is that how to get USB ISP (CRP DISABLD) once the user code is running from the diagram below? Pin P0_3 seems to be checked during the boot process after the reset. What about after entering the user code?
Also, Pin P0_3 is always high once powered. Calling Reinvoke ISP seems to be working, but if I configure USB, it does no longer work. I have tested this with LPC11U68 evaluation board.
- Could you please use usbd_rom_hid_generic project from the LPCOpen and try to go into the USP ISP (CRP DISABLD)? I tried it by simply adding the code below in the while (1) loop in main function. I used the LPC11U68 evaluation board (OM13058). It doesn’t work.
As you said, P0_3 should be high once I connect a cable to the connector, so I don’t need to drive the pin P0_3. Is there anything else I need to set before calling Chip_IAP_ReinvokeISP() function?while (1) {
Chip_IAP_ReinvokeISP();
__WFI();
}
- On your answer to question 2, could you please explain what it means with the user code valid signature must be either part of the vector, or the axf (or binary) file musht be post-processed to insert the checksum. How can I achieve these?
Many thanks for your support.
David
