Struct stm32_metapac::lpdma::regs::ChBr1

#[repr(transparent)]
pub struct ChBr1(pub u32);

Expand description

LPDMA channel 15 alternate block register 1

Tuple Fields§

§0: u32

Implementations§

§

impl ChBr1

pub const fn bndt(&self) -> u16

block number of data bytes to transfer from the source. Block size transferred from the source. When the channel is enabled, this field becomes read-only and is decremented, indicating the remaining number of data items in the current source block to be transferred. BNDT[15:0] is programmed in number of bytes, maximum source block size is 64 Kbytes -1. Once the last data transfer is completed (BNDT[15:0] = 0): - if CH[x].LLR.UB1 = 1, this field is updated by the LLI in the memory. - if CH[x].LLR.UB1 = 0 and if there is at least one not null Uxx update bit, this field is internally restored to the programmed value. - if all CH[x].LLR.Uxx = 0 and if CH[x].LLR.LA[15:0] ≠ 0, this field is internally restored to the programmed value (infinite/continuous last LLI). - if CH[x].LLR = 0, this field is kept as zero following the last LLI data transfer. Note: A non-null source block size must be a multiple of the source data width (BNDT[2:0] versus CH[x].TR1.SDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued. When configured in packing mode (CH[x].TR1.PAM[1]=1 and destination data width different from source data width), a non-null source block size must be a multiple of the destination data width (BNDT[2:0] versus CH[x].TR1.DDW[1:0]). Else a user setting error is reported and no transfer is issued.

pub fn set_bndt(&mut self, val: u16)

block number of data bytes to transfer from the source. Block size transferred from the source. When the channel is enabled, this field becomes read-only and is decremented, indicating the remaining number of data items in the current source block to be transferred. BNDT[15:0] is programmed in number of bytes, maximum source block size is 64 Kbytes -1. Once the last data transfer is completed (BNDT[15:0] = 0): - if CH[x].LLR.UB1 = 1, this field is updated by the LLI in the memory. - if CH[x].LLR.UB1 = 0 and if there is at least one not null Uxx update bit, this field is internally restored to the programmed value. - if all CH[x].LLR.Uxx = 0 and if CH[x].LLR.LA[15:0] ≠ 0, this field is internally restored to the programmed value (infinite/continuous last LLI). - if CH[x].LLR = 0, this field is kept as zero following the last LLI data transfer. Note: A non-null source block size must be a multiple of the source data width (BNDT[2:0] versus CH[x].TR1.SDW_LOG2[1:0]). Else a user setting error is reported and no transfer is issued. When configured in packing mode (CH[x].TR1.PAM[1]=1 and destination data width different from source data width), a non-null source block size must be a multiple of the destination data width (BNDT[2:0] versus CH[x].TR1.DDW[1:0]). Else a user setting error is reported and no transfer is issued.

pub const fn brc(&self) -> u16

Block repeat counter. This field contains the number of repetitions of the current block (0 to 2047). When the channel is enabled, this field becomes read-only. After decrements, this field indicates the remaining number of blocks, excluding the current one. This counter is hardware decremented for each completed block transfer. Once the last block transfer is completed (BRC[10:0] = BNDT[15:0] = 0): If CH[x].LLR.UB1 = 1, all CH[x].BR1 fields are updated by the next LLI in the memory. If CH[x].LLR.UB1 = 0 and if there is at least one not null Uxx update bit, this field is internally restored to the programmed value. if all CH[x].LLR.Uxx = 0 and if CH[x].LLR.LA[15:0] ≠ 0, this field is internally restored to the programmed value (infinite/continuous last LLI). if CH[x].LLR = 0, this field is kept as zero following the last LLI and data transfer.

pub fn set_brc(&mut self, val: u16)

Block repeat counter. This field contains the number of repetitions of the current block (0 to 2047). When the channel is enabled, this field becomes read-only. After decrements, this field indicates the remaining number of blocks, excluding the current one. This counter is hardware decremented for each completed block transfer. Once the last block transfer is completed (BRC[10:0] = BNDT[15:0] = 0): If CH[x].LLR.UB1 = 1, all CH[x].BR1 fields are updated by the next LLI in the memory. If CH[x].LLR.UB1 = 0 and if there is at least one not null Uxx update bit, this field is internally restored to the programmed value. if all CH[x].LLR.Uxx = 0 and if CH[x].LLR.LA[15:0] ≠ 0, this field is internally restored to the programmed value (infinite/continuous last LLI). if CH[x].LLR = 0, this field is kept as zero following the last LLI and data transfer.

pub const fn sdec(&self) -> Dec

source address decrement

pub fn set_sdec(&mut self, val: Dec)

source address decrement

pub const fn ddec(&self) -> Dec

destination address decrement

pub fn set_ddec(&mut self, val: Dec)

destination address decrement

pub const fn brsdec(&self) -> Dec

Block repeat source address decrement. Note: On top of this increment/decrement (depending on BRSDEC), CH[x].SAR is in the same time also updated by the increment/decrement (depending on SDEC) of the CH[x].TR3.SAO value, as it is done after any programmed burst transfer.

pub fn set_brsdec(&mut self, val: Dec)

Block repeat source address decrement. Note: On top of this increment/decrement (depending on BRSDEC), CH[x].SAR is in the same time also updated by the increment/decrement (depending on SDEC) of the CH[x].TR3.SAO value, as it is done after any programmed burst transfer.

pub const fn brddec(&self) -> Dec

Block repeat destination address decrement. Note: On top of this increment/decrement (depending on BRDDEC), CH[x].DAR is in the same time also updated by the increment/decrement (depending on DDEC) of the CH[x].TR3.DAO value, as it is usually done at the end of each programmed burst transfer.

pub fn set_brddec(&mut self, val: Dec)

Block repeat destination address decrement. Note: On top of this increment/decrement (depending on BRDDEC), CH[x].DAR is in the same time also updated by the increment/decrement (depending on DDEC) of the CH[x].TR3.DAO value, as it is usually done at the end of each programmed burst transfer.