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deadprogram
37 lines
860 B
Go
37 lines
860 B
Go
//go:build stm32l4x5
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package machine
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// Peripheral abstraction layer for the stm32l4x5
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func CPUFrequency() uint32 {
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return 120e6
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}
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// Internal use: configured speed of the APB1 and APB2 timers, this should be kept
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// in sync with any changes to runtime package which configures the oscillators
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// and clock frequencies
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const APB1_TIM_FREQ = 120e6 // 120MHz
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const APB2_TIM_FREQ = 120e6 // 120MHz
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//---------- I2C related code
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// Gets the value for TIMINGR register
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func (i2c *I2C) getFreqRange(br uint32) uint32 {
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// This is a 'magic' value calculated by STM32CubeMX
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// for 120MHz PCLK1.
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// TODO: Do calculations based on PCLK1
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switch br {
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case 10 * KHz:
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return 0x0 // does this even work? zero is weird here.
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case 100 * KHz:
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return 0x307075B1
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case 400 * KHz:
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return 0x00B03FDB
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case 500 * KHz:
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return 0x005017C7
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default:
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return 0
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}
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}
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