I am new to Stellaris LM3S8962. I want to inquire about how to write 4 separate ISRs to handle interrupts originated from 4 buttons Up, Down, Left, Right. I have tried but my code always fell into FaultISR.
Thanks!
https://www.dropbox.com/s/5j5il9kt324o943/Lab%202.rar?dl=0
The link above is my project.
It works fine, but when I add the following statements to the Startup task it would fall into FaultISR
// Configure the UART
SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
// Enable processor interrupts.
IntMasterEnable();
// Set GPIO A0 and A1 as UART pins.
GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
// Configure the UART for 9600, 8-N-1 operation.
UARTConfigSetExpClk(UART0_BASE, SysCtlClockGet(), 9600,
(UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE |
UART_CONFIG_PAR_NONE));
// Enable the UART interrupt.
IntEnable(INT_UART0);
UARTIntEnable(UART0_BASE, UART_INT_RX | UART_INT_RT);
Related
I am currently working on a project with LoRaWAN technology using STM32F103C8T6 microcontroller. For LoRa I am using SPI in Full-Duplex Master mode (spi1 specifically) and in CubeIDE when you activate SPI1, automatically pins PA5, PA6 and PA7 are activated (ver1):
However, PCB is designed and printed and those pins are unfortunately busy. Because, before it was planned to use other SPI1 pins (PB3, PB4, PB5) (ver2):
So, when I use ver1, all is good, LoRa connects to server and sends data without a problem. However, when I use ver2, it does not work at all. I debugged to find where is problem and found out that, SPI read fails (when version of LoRa is read, it returns 0). Thus, ASSERT fires and code is stuck in infinite loop. I could not find any reference of difference of SPI pins in the internet.
Can anyone explain the difference of these pins? And is it possible to use ver2? Thanks beforehand.
P.S. I am using HAL Library + LMIC library (for LoRa) and the configuration of SPI are the same for both ver1 and ver2. Here is code of configuration, if needed:
void MX_SPI1_Init(void)
{
hspi1.Instance = SPI1;
hspi1.Init.Mode = SPI_MODE_MASTER;
hspi1.Init.Direction = SPI_DIRECTION_2LINES;
hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi1.Init.NSS = SPI_NSS_SOFT;
hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_64;
hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi1.Init.CRCPolynomial = 10;
if (HAL_SPI_Init(&hspi1) != HAL_OK)
{
Error_Handler();
}
}
P.S.S: I also gave this question in electronics stackexchange, but there was no answer there, so I decided to share the question here too.
After lots of tries, I found out that, remapped SPI1 does not work together with I2C1, because of I2C1-SMBA pin overlap with SP1 MOSI pin (PB5), even if you are not using SMBA. You can find about that here: STM32F103x8 errata chapter 2.8.7
So, I guess, I will use I2C2 for avoiding collision. The only change I should make on PCB would be redirecting I2C1 pins to I2C2 (2 pins), which is way better than redirecting SPI1 pins (3 pins) and other elements occupying ver1 (also 3) pins.
I would provide din+ to A1 and din- to A2, on pin connector on PM2 module, connecting to FPGA, but I have only 1 input port "din" in top level vhdl design module connected to AG7 pin on FPGA. How to go about connection in UCF file ?
PM2 Pin - A1, A2
FPGA pin -AG7, AG6
FPGA bank VCCO - 2.5v, 2.5v
Pin Function - LVDS pair 100 ohm differential impedance; can also be used as single-ended
You have to manually instantiate the differential input buffer. For Xilinx it will be IBUFDS in the Unisim library. Either modify your port to have two pins for din and add the buffer in the existing design or write a simple wrapper that converts the diff. pairs to single-ended and pass that into the current port.
I am using PIC32MX Clicker (PIC32MX534F064H microcontroller) for transmitting data through UART and receiving the same on PC using a USB to serial converter at baudrate 115200.
When I try to send the data through PIC32 and read on my PC, I recieved data but, which are different. Please see below for code snippets. It would be great if anyone could suggest me what to modify to get the uart working. Thanks
#define GetSystemClock() (80000000ul)
#define GetPeripheralClock() (GetSystemClock()/(1 << OSCCONbits.PBDIV))
#define GetInstructionClock() (GetSystemClock())
void initSerial(){
UARTConfigure(UART5,UART_ENABLE_PINS_TX_RX_ONLY);
UARTSetFifoMode(UART5, UART_INTERRUPT_ON_TX_NOT_FULL
| UART_INTERRUPT_ON_RX_NOT_EMPTY);
UARTSetLineControl(UART5, UART_DATA_SIZE_8_BITS | UART_PARITY_NONE | UART_STOP_BITS_1);
UARTSetDataRate(UART5, GetPeripheralClock(), 115200);
UARTEnable(UART5, UART_ENABLE_FLAGS(UART_PERIPHERAL | UART_RX | UART_TX));
}
void writeSerial(uint8_t c){
while(!UARTTransmitterIsReady(UART5));
UARTSendDataByte(UART5, c);
while(!UARTTransmissionHasCompleted(UART5));
}
Below is how I configure my 9600 UART5 on a PIC32MX795F512L for use to communicate with a GPS chip. This should be the same just replace with 115200 and it should work. If it doesn't try 9600 on the off chance you have a fake FTDI USB<->Serial converter, the fake ones can be very fickle.
UARTConfigure(UART5, UART_ENABLE_PINS_TX_RX_ONLY);
UARTSetFifoMode(UART5, UART_INTERRUPT_ON_RX_NOT_EMPTY);
UARTSetLineControl(UART5, UART_DATA_SIZE_8_BITS | UART_PARITY_NONE | UART_STOP_BITS_1);
/* configPERIPHERAL_CLOCK_HZ = 40000000 */
UARTSetDataRate(UART5, configPERIPHERAL_CLOCK_HZ, 9600);
UARTEnable(UART5, UART_ENABLE_FLAGS(UART_PERIPHERAL | UART_RX | UART_TX));
INTSetVectorPriority(INT_VECTOR_UART(UART5), configKERNEL_INTERRUPT_PRIORITY + 1);
INTSetVectorSubPriority(INT_VECTOR_UART(UART5), INT_SUB_PRIORITY_LEVEL_2);
INTEnable(INT_SOURCE_UART_RX(UART5), INT_ENABLED);
I have some experience of StdPeriph libraries usage for programming stm32. But now I tried STM32Cube HAL with STM32CubeMX code generator. I generated a project with this options:
Middleware: FreeRTOS and FatFS via SDIO
Compiler is GCC
stm32f103ret6 MCU
I imported generated code to Eclipse environment. I made a binary and flashed it with "st-flash write ..." as usual. My test program successfuly wrote to USART1 "Hello" in cycle - this is no problem. But then, when I tried to flash another code, it failed with "unknown chip id". If I manually connect NRST to GND, st-flash gives:
...Flash: 0 bytes (0 KiB) in pages of 2048 bytes
Full output:
2015-06-14T16:07:29 INFO src/stlink-common.c: Loading device parameters....
2015-06-14T16:07:29 INFO src/stlink-common.c: Device connected is: F1 High-density device, id 0x10036414
2015-06-14T16:07:29 INFO src/stlink-common.c: SRAM size: 0x10000 bytes (64 KiB), Flash: 0 bytes (0 KiB) in pages of 2048 bytes
I tried to use ST-Link Utility from Windows, but it cannot connect to this MCU to change option bytes (connection to another devices with stm32 works well).
I tried to flash through USART1, but it failed.
Source code I flashed, of course, does not contain any read/write protection enabling. I tried 2 another MCU, but this error was reproduced.
How can I unbrick by MCUs and flash anything?
I found a root cause!
This is a HAL initialization function, generated by STM32CubeMX:
void HAL_MspInit(void)
{
/* USER CODE BEGIN MspInit 0 */
/* USER CODE END MspInit 0 */
__HAL_RCC_AFIO_CLK_ENABLE();
HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);
/* System interrupt init*/
/* SysTick_IRQn interrupt configuration */
HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
/**DISABLE: JTAG-DP Disabled and SW-DP Disabled
*/
__HAL_AFIO_REMAP_SWJ_DISABLE();
/* USER CODE BEGIN MspInit 1 */
/* USER CODE END MspInit 1 */
}
I didn't notice this simple lines!
/**DISABLE: JTAG-DP Disabled and SW-DP Disabled
*/
__HAL_AFIO_REMAP_SWJ_DISABLE();
This macros totally disables SWD and JTAG programming, look at stm321xx_hal_gpio_ex.h:
#define __HAL_AFIO_REMAP_SWJ_DISABLE() MODIFY_REG(AFIO->MAPR, AFIO_MAPR_SWJ_CFG, AFIO_MAPR_SWJ_CFG_DISABLE)
I didn't found any checkbox in CubeMX to disable/enable SWD/JTAG, so this is the only behavior of code generator! Pay attention to this point when using STM32CubeMX!
If you set the pin assignments for the JTAG/SWD pins correctly (e.g. SYS_JTDI, SYS_JTDO-TRACESWO, etc.) on the pinout tab of STM32CubeMX, the generated code will not disable JTAG/SWD.
It's (BURIED) under Pinout | SYS | Debug of STM32CubeMX...set to Serial Wire or whatever.
I am trying to use UP501 gps module on Arduino and get a raw information from the GPS like long, lat,alt..etc
I am running this code on Arduino to see if the serial on GPS is available, if it is then print out the data from GPS.
Arduino Code:
#include <SoftwareSerial.h>
SoftwareSerial mySerial(10, 11); // RX, TX .
void setup()
{
// Open serial communications and wait for port to open:
Serial.begin(57600);
Serial.println("Searching using GPS...");
// set the data rate for the SoftwareSerial port
mySerial.begin(9600);
}
void loop() // run over and over
{
if (mySerial.available())
Serial.write(mySerial.read());
}
My problem: I don't get any data from the GPS module.
I thought it would be from the wiring. See the picture below of my wiring.
yellow wire from pin 2 is connected to D10 which will be the RX
black wire from pin 3 is connected to ground.
Red wire from pin 4 is connected to 3.3 volts
Note: I went outside(outdoor) to get a satellite but no information
There is a tutorial on adafruit for using this gps
I sugest you take a look at it becuse your wireing seems to be missing a few things