Overview
========
The freertos_i2c example shows an application using RTOS tasks with I2C driver:
The example supports 2 different connections:
On board connection and board to board connection.
With one board connection, 2 I2C instances of the same board are used. One i2c instance used as I2C master and another I2C instance used as I2C slave .
Default settings in freertos_i2c.c (in folder boards\<board>\rtos_examples\freertos_i2c) is applied.
Two tasks are created. One task is associated with an I2C master operation and another task deals with I2C slave operation.
1. I2C master task sends data to I2C slave task.
2. I2C master task reads data sent back from I2C slave task.
The transmit data and the receive data of both I2C master task and I2C slave task are printed out on terminal.
With board to board connection, one I2C instance on one board is used as I2C master and the I2C instance on other board is used as I2C slave. Tasks are created to run on each board to handle I2C communication.
File freertos_i2c.c should have following definitions:
#define EXAMPLE_CONNECT_I2C BOARD_TO_BOARD
For board used as I2C master:
#define I2C_MASTER_SLAVE isMASTER
For board used as I2C slave:
#define I2C_MASTER_SLAVE isSLAVE
Toolchain supported
===================
- IAR embedded Workbench 8.11.2
- Keil MDK 5.23
- MCUXpresso10.0.0
Hardware requirements
=====================
- Mini USB cable
- LPCXpresso54102 board
- Personal Computer
Board settings
==============
To make i2c example work, connections needed to be as follows:
I2C0 connected to I2C1
SCL P0_23(J1 pin1) --> P0_25(J2 pin14)
SDA P0_24(J1 pin3) --> P0_26(J2 pin16)
Prepare the Demo
================
1. Connect a micro USB cable between the PC host and the CMSIS DAP USB port (J6) on the board
2. Open a serial terminal with the following settings (See Appendix A in Getting started guide for description how to determine serial port number):
- 115200 baud rate
- 8 data bits
- No parity
- One stop bit
- No flow control
3. Download the program to the target board.
4. Either press the reset button on your board or launch the debugger in your IDE to begin running
the demo.
Running the demo
================
When the example runs successfully:
If using 1 board, you can see the similar information from the terminal as below. (Applicable to all boards except TWR-KM34Z75M)
==FreeRTOS I2C example start.==
This example use one i2c instance as master and another as slave on one board.
Master will send data :
0x 0 0x 1 0x 2 0x 3 0x 4 0x 5 0x 6 0x 7
0x 8 0x 9 0x a 0x b 0x c 0x d 0x e 0x f
0x10 0x11 0x12 0x13 0x14 0x15 0x16 0x17
0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x1e 0x1f
I2C slave transfer completed successfully.
Slave received data :
0x 0 0x 1 0x 2 0x 3 0x 4 0x 5 0x 6 0x 7
0x 8 0x 9 0x a 0x b 0x c 0x d 0x e 0x f
0x10 0x11 0x12 0x13 0x14 0x15 0x16 0x17
0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x1e 0x1f
This time , slave will send data: :
0xff 0xfe 0xfd 0xfc 0xfb 0xfa 0xf9 0xf8
0xf7 0xf6 0xf5 0xf4 0xf3 0xf2 0xf1 0xf0
0xef 0xee 0xed 0xec 0xeb 0xea 0xe9 0xe8
0xe7 0xe6 0xe5 0xe4 0xe3 0xe2 0xe1 0xe0
Master received data :
0xff 0xfe 0xfd 0xfc 0xfb 0xfa 0xf9 0xf8
0xf7 0xf6 0xf5 0xf4 0xf3 0xf2 0xf1 0xf0
0xef 0xee 0xed 0xec 0xeb 0xea 0xe9 0xe8
0xe7 0xe6 0xe5 0xe4 0xe3 0xe2 0xe1 0xe0
End of FreeRTOS I2C example.
If using 2 boards, you can see the similar information from the terminal associated with master board and slave board as below. (Applicable to all boards)
For master:
==FreeRTOS I2C example start.==
This example use two boards to connect with one as master and another as slave.
Master will send data :
0x 0 0x 1 0x 2 0x 3 0x 4 0x 5 0x 6 0x 7
0x 8 0x 9 0x a 0x b 0x c 0x d 0x e 0x f
0x10 0x11 0x12 0x13 0x14 0x15 0x16 0x17
0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x1e 0x1f
Master received data :
0x 0 0x 1 0x 2 0x 3 0x 4 0x 5 0x 6 0x 7
0x 8 0x 9 0x a 0x b 0x c 0x d 0x e 0x f
0x10 0x11 0x12 0x13 0x14 0x15 0x16 0x17
0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x1e 0x1f
End of FreeRTOS I2C example.
For slave:
==FreeRTOS I2C example start.==
This example use two boards to connect with one as master and another as slave.
I2C slave transfer completed successfully.
Slave received data :
0x 0 0x 1 0x 2 0x 3 0x 4 0x 5 0x 6 0x 7
0x 8 0x 9 0x a 0x b 0x c 0x d 0x e 0x f
0x10 0x11 0x12 0x13 0x14 0x15 0x16 0x17
0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x1e 0x1f
End of FreeRTOS I2C example.
Customization options
=====================
lower_power_show.zip_ARMCM4——FP_LPC 超低功耗例程_show （2000个子文件） 
arm_linear_interp_data.c 4.12MB arm_common_tables.c 868KB arm_dct4_init_f32.c 786KB bmi160.c 643KB arm_dct4_init_q31.c 417KB arm_rfft_init_f32.c 362KB arm_dct4_init_q15.c 272KB bma2x2.c 248KB arm_rfft_init_q31.c 215KB tasks.c 155KB arm_rfft_init_q15.c 141KB queue.c 82KB bmm050.c 76KB fsl_debug_console.c 68KB arm_cfft_radix4_q15.c 56KB fsl_usart_cmsis.c 49KB bmp280.c 48KB fsl_i2c.c 47KB fsl_clock.c 46KB arm_conv_partial_fast_q15.c 44KB arm_fft_bin_data.c 43KB arm_fft_bin_data.c 43KB fsl_usart.c 43KB fsl_spi_cmsis.c 41KB arm_cfft_radix4_q31.c 40KB timers.c 40KB fsl_spi.c 40KB arm_conv_fast_q15.c 40KB fsl_i2c_cmsis.c 39KB arm_correlate_fast_q15.c 38KB rpmsg_lite.c 37KB arm_cfft_radix4_f32.c 35KB arm_fir_f32.c 30KB startup_lpc5410x.c 29KB event_groups.c 26KB arm_conv_partial_q15.c 25KB arm_correlate_q7.c 25KB pin_mux.c 25KB pin_mux.c 25KB arm_conv_partial_q7.c 24KB arm_mat_inverse_f32.c 24KB arm_mat_inverse_f64.c 24KB arm_correlate_f32.c 24KB arm_biquad_cascade_stereo_df2T_f32.c 23KB arm_correlate_q15.c 23KB arm_graphic_equalizer_example_q31.c 23KB arm_conv_q15.c 23KB fsl_spi_dma.c 22KB arm_fir_q15.c 22KB arm_conv_q7.c 22KB arm_conv_partial_f32.c 22KB arm_conv_partial_fast_opt_q15.c 22KB arm_conv_partial_opt_q7.c 22KB arm_correlate_q31.c 21KB arm_biquad_cascade_df1_32x64_q31.c 21KB arm_conv_partial_opt_q15.c 21KB arm_conv_partial_fast_q31.c 21KB fsl_shell.c 21KB arm_correlate_fast_q31.c 20KB port.c 20KB arm_conv_f32.c 20KB arm_signal_converge_data.c 20KB arm_fir_interpolate_f32.c 20KB arm_conv_partial_q31.c 20KB fsl_i2c_dma.c 20KB arm_biquad_cascade_df2T_f64.c 19KB arm_biquad_cascade_df2T_f32.c 19KB virtqueue.c 19KB arm_fir_decimate_q15.c 19KB arm_conv_fast_q31.c 19KB fsl_sctimer.c 19KB port.c 19KB arm_cfft_f32.c 19KB pin_mux.c 19KB pin_mux.c 19KB heap_5.c 18KB arm_cfft_radix2_q15.c 18KB arm_dct4_f32.c 18KB arm_conv_q31.c 18KB freertos_generic.c 17KB arm_fir_lattice_f32.c 17KB arm_fir_decimate_f32.c 17KB arm_fir_decimate_fast_q15.c 17KB arm_biquad_cascade_df1_f32.c 17KB arm_fir_lattice_q15.c 17KB heap_4.c 17KB port.c 16KB arm_graphic_equalizer_data.c 16KB arm_lms_f32.c 16KB arm_lms_norm_f32.c 16KB clock_config.c 15KB clock_config.c 15KB clock_config.c 15KB clock_config.c 15KB clock_config.c 15KB clock_config.c 15KB clock_config.c 15KB clock_config.c 15KB clock_config.c 15KB clock_config.c 15KB共 2000 条
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