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Add new DMA sniffer's API (#887)

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andygpz11 2022-11-02 14:25:27 +00:00 committed by GitHub
parent e4da37cf0c
commit 5258ee640b
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1 changed files with 58 additions and 3 deletions
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61
src/rp2_common/hardware_dma/include/hardware/dma.h
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@ -741,9 +741,13 @@ inline static void dma_sniffer_enable(uint channel, uint mode, bool force_channe
if (force_channel_enable) { if (force_channel_enable) {
hw_set_bits(&dma_hw->ch[channel].al1_ctrl, DMA_CH0_CTRL_TRIG_SNIFF_EN_BITS); hw_set_bits(&dma_hw->ch[channel].al1_ctrl, DMA_CH0_CTRL_TRIG_SNIFF_EN_BITS);
} }
dma_hw->sniff_ctrl = ((channel << DMA_SNIFF_CTRL_DMACH_LSB) & DMA_SNIFF_CTRL_DMACH_BITS) | hw_write_masked(&dma_hw->sniff_ctrl,
((mode << DMA_SNIFF_CTRL_CALC_LSB) & DMA_SNIFF_CTRL_CALC_BITS) | (((channel << DMA_SNIFF_CTRL_DMACH_LSB) & DMA_SNIFF_CTRL_DMACH_BITS) |
DMA_SNIFF_CTRL_EN_BITS; ((mode << DMA_SNIFF_CTRL_CALC_LSB) & DMA_SNIFF_CTRL_CALC_BITS) |
DMA_SNIFF_CTRL_EN_BITS),
(DMA_SNIFF_CTRL_DMACH_BITS |
DMA_SNIFF_CTRL_CALC_BITS |
DMA_SNIFF_CTRL_EN_BITS));
} }
/*! \brief Enable the Sniffer byte swap function /*! \brief Enable the Sniffer byte swap function
@ -764,6 +768,36 @@ inline static void dma_sniffer_set_byte_swap_enabled(bool swap) {
hw_clear_bits(&dma_hw->sniff_ctrl, DMA_SNIFF_CTRL_BSWAP_BITS); hw_clear_bits(&dma_hw->sniff_ctrl, DMA_SNIFF_CTRL_BSWAP_BITS);
} }
/*! \brief Enable the Sniffer output invert function
* \ingroup hardware_dma
*
* If enabled, the sniff data result appears bit-inverted when read.
* This does not affect the way the checksum is calculated.
*
* \param invert Set true to enable output bit inversion
*/
inline static void dma_sniffer_set_output_invert_enabled(bool invert) {
if (invert)
hw_set_bits(&dma_hw->sniff_ctrl, DMA_SNIFF_CTRL_OUT_INV_BITS);
else
hw_clear_bits(&dma_hw->sniff_ctrl, DMA_SNIFF_CTRL_OUT_INV_BITS);
}
/*! \brief Enable the Sniffer output bit reversal function
* \ingroup hardware_dma
*
* If enabled, the sniff data result appears bit-reversed when read.
* This does not affect the way the checksum is calculated.
*
* \param reverse Set true to enable output bit reversal
*/
inline static void dma_sniffer_set_output_reverse_enabled(bool reverse) {
if (reverse)
hw_set_bits(&dma_hw->sniff_ctrl, DMA_SNIFF_CTRL_OUT_REV_BITS);
else
hw_clear_bits(&dma_hw->sniff_ctrl, DMA_SNIFF_CTRL_OUT_REV_BITS);
}
/*! \brief Disable the DMA sniffer /*! \brief Disable the DMA sniffer
* \ingroup hardware_dma * \ingroup hardware_dma
* *
@ -772,6 +806,27 @@ inline static void dma_sniffer_disable(void) {
dma_hw->sniff_ctrl = 0; dma_hw->sniff_ctrl = 0;
} }
/*! \brief Set the sniffer's data accumulator with initial value
* \ingroup hardware_dma
*
* Generally, CRC algorithms are used with the data accumulator initially
* seeded with 0xFFFF or 0xFFFFFFFF (for crc16 and crc32 algorithms)
*
* \param seed_value value to set data accumulator
*/
inline static void dma_sniffer_set_data_accumulator(uint32_t seed_value) {
dma_hw->sniff_data = seed_value;
}
/*! \brief Get the sniffer's data accumulator value
* \ingroup hardware_dma
*
* Read value calculated by the hardware from sniffing the DMA stream
*/
inline static uint32_t dma_sniffer_get_data_accumulator(void) {
return dma_hw->sniff_data;
}
/*! \brief Mark a dma timer as used /*! \brief Mark a dma timer as used
* \ingroup hardware_dma * \ingroup hardware_dma
* *