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tests/periph_i2c: Add clk stretch test #125

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tests/periph_i2c: Add clk stretch test #125

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38 changes: 38 additions & 0 deletions tests/periph_i2c/tests/05__periph_i2c_clk_stretch.robot
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*** Settings ***
Documentation Tests clock stretching.

Suite Setup Run Keywords PHILIP Reset
... RIOT Reset
... API Firmware Should Match
Test Setup Run Keywords PHILIP Reset
... RIOT Reset
... API Sync Shell
... I2C Acquire
Test Teardown I2C Release

Resource periph_i2c.keywords.txt
Resource api_shell.keywords.txt
Resource riot_base.keywords.txt

Force Tags periph i2c

*** Test Cases ***
Read Register with clock stretching
[Documentation] Verify DUT functions with clock stretching.
API Call Should Succeed I2C Read Regs reg=2 leng=10
Set Test Variable ${accepted_vals} ${RESULT['data']}
API Call Should Succeed PHiLIP.write_reg i2c.mode.init 0
API Call Should Succeed PHiLIP.write_reg i2c.clk_stretch_delay 0
API Call Should Succeed PHiLIP.Execute Changes
API Call Should Succeed I2C Read Regs reg=2 leng=10
Should Be Equal ${RESULT['data']} ${accepted_vals}
API Call Should Succeed PHiLIP.write_reg i2c.mode.init 0
API Call Should Succeed PHiLIP.write_reg i2c.clk_stretch_delay 1000
API Call Should Succeed PHiLIP.Execute Changes
API Call Should Succeed I2C Read Regs reg=2 leng=10
Should Be Equal ${RESULT['data']} ${accepted_vals}
API Call Should Succeed PHiLIP.write_reg i2c.mode.init 0
API Call Should Succeed PHiLIP.write_reg i2c.clk_stretch_delay 16000
API Call Should Succeed PHiLIP.Execute Changes
API Call Should Succeed I2C Read Regs reg=2 leng=10
Should Be Equal ${RESULT['data']} ${accepted_vals}