ASF4 and I2C

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smrutirekha26
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Posted by smrutirekha26: Thu. Jun 10, 2021 - 03:10 AM
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So how you connect i2c ...using asf4...there is very less api for writing 

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Tools, Atmel Software Framework (ASF) and Atmel Start (ASFv4) (ARM-related)
Last Edited: Thu. Jun 10, 2021 - 01:05 PM
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jgmdesign
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Posted by jgmdesign: Thu. Jun 10, 2021 - 01:05 PM
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It would help if you mention what processor your target is.

 

JIm

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Bronze Markawneil
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Posted by awneil: Thu. Jun 10, 2021 - 01:21 PM
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Don't you just go to https://start.atmel.com/ and take it from there - it should all be "intuitive" ...

 

laugh

 

 

 

 

 

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Last Edited: Thu. Jun 10, 2021 - 01:31 PM
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dav1977
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Posted by dav1977: Thu. Jun 10, 2021 - 01:36 PM
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proc SAMD21  --  asf4  -- sync or async(select in atmelstart)

i2c master does not want to transmit data, waiting for confirmation from the slave. Makes a pulse in the bus and that's it.   

 

------------INIT

 i2c_m_sync_get_io_descriptor(&I2C_0, &I2DESC);
 i2c_m_sync_enable(&I2C_0);
 i2c_m_sync_set_slaveaddr(&I2C_0, 0x49, I2C_M_SEVEN);

 

---main

delay_ms(100);

err=io_write(I2C_0, (uint8_t *)"Hello World!", 12);

or

err=i2c_m_sync_cmd_write(&I2C_0, (uint8_t)0x00, &data[0] , 12)

debug err= -4      what to do next???

 

 

Last Edited: Thu. Jun 10, 2021 - 01:59 PM
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