Hi Jerzy,
Thank you for your help. I have partially tested it and now it is working
without error. Your suggestions to update only the buffer in for loop
helped to solve the problem.
So finally, I have kind of ported the note-c library for Apache Mynewt.
Regards,
Ujjval Rathod.
On Tue, Aug 27, 2024 at 11:16 AM Jerzy Kasenberg <
jerzy.kasenb...@codecoup.pl> wrote:
> pon., 26 sie 2024 o 16:20 Ujjval Rathod <ujjwalrathod...@gmail.com>
> napisał(a):
> >
> > Hi,
> >
> > I was trying to port the note-c library to communicate with Blues
> wireless notecard over I2C.
> > For that I created a package in the core repository and pasted all the
> sources and headers. They are compelling when I build the code.
> > Then I wrote some MyNewt I2C API specific code. I took some inspiration
> from the code of Zephyr-RTOS port. The code compiles fine but when I try to
> communicate with notecard I get the following error.
> > The unhandled interrupt is from os_fault.c. But I do not understand why
> I am getting this error.
> > I am using nRF52840-DK for my examples.
> >
> > Please see the attached code for more information.
> >
> > 000065 [ERROR] notecard not responding
> > 000130 [ERROR] notecard not responding
> > 000195 [ERROR] notecard not responding
> > 000260 [ERROR] notecard not responding
> > 000325 [ERROR] notecard not responding
> > 000390 [ERROR] notecard not responding
> > 000455 [ERROR] notecard not responding
> > 000520 [ERROR] notecard not responding
> > 000585 [ERROR] notecard not responding
> > 000650 [ERROR] notecard not responding
> > 000773 Unhandled interrupt (3), exception sp 0x20001370
> > 000773 r0:0x00000000 r1:0x00017948 r2:0x00017763 r3:0x20000258
> > 000773 r4:0x77630000 r5:0x00300001 r6:0x12b8dead r7:0xbeef2000
> > 000773 r8:0x12c0dead r9:0x01062000 r10:0x12400a80 r11:0x77602000
> > 000773 r12:0xa0000000 lr:0x00012505 pc:0x1a000000 psr:0x61000000
> > 000773 ICSR:0x00421803 HFSR:0x40000000 CFSR:0x00000100
> > 000773 BFAR:0xe000ed38 MMFAR:0xe000ed34
> >
> > Regards,
> > Ujjval
>
> Hi,
>
> here is Mynewt equivalent of Zephyr code.
>
> Previous version of both note_i2c_write and note_i2c_receive should
> look more like this.
>
> const char *note_i2c_receive(uint16_t device_address_, uint8_t
> *buffer_, uint16_t size_, uint32_t *available_)
> {
>
> //const int request_length = size_ + REQUEST_HEADER_SIZE;
> //request_length
> uint8_t size_buf[2];
> size_buf[0] = 0;
> size_buf[1] = (uint8_t)size_;
>
> struct hal_i2c_master_data data = {
> .address = device_address_,
> .len = sizeof(size_buf),
> .buffer = size_buf,
> };
> uint8_t write_result = hal_i2c_master_write(i2c_num, &data,
> OS_TICKS_PER_SEC / 10, 0);
>
> if (write_result != 0) {
> return "i2c: unable to initiate read from the notecard\n";
> }
> // Read from the Notecard and copy the response bytes into the
> response buffer
> const int request_length = size_ + REQUEST_HEADER_SIZE;
> uint8_t read_buf[256];
>
> data.len = request_length;
> data.buffer = read_buf;
> uint8_t read_result = hal_i2c_master_read(i2c_num, &data,
> OS_TICKS_PER_SEC / 10, 1);
>
> if (read_result != 0) {
> return "i2c: Unable to receive data from the Notecard.\n";
> } else {
> *available_ = (uint32_t)read_buf[0];
> uint8_t bytes_to_read = read_buf[1];
> for (size_t i = 0; i < bytes_to_read; i++) {
> buffer_[i] = read_buf[i + 2];
> }
> return NULL;
> }
> }
>
> ........
>
> const char *note_i2c_transmit(uint16_t device_address_, uint8_t
> *buffer_, uint16_t size_)
> {
> uint8_t write_buf[size_ + 1];
> write_buf[0] = (uint8_t)size_;
> for (size_t i = 0; i < size_; i++) {
> write_buf[i + 1] = buffer_[i];
> }
>
> struct hal_i2c_master_data data = {
> .address = device_address_,
> .len = size_ + 1,
> .buffer = write_buf,
> };
>
> uint8_t write_result = hal_i2c_master_write(i2c_num, &data,
> OS_TICKS_PER_SEC / 5, 1);
>
> if (write_result != 0) {
> return "i2c: Unable to transmit data to the Notecard\n";
> } else {
> return NULL;
> }
> }
>
> best regards
> Jerzy
>
