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Extend QSPI config with freq, delay, spi mode, and address mode

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Til Blechschmidt 2022-08-01 12:54:49 +02:00
parent bd6bab1625
commit fa2fbcbde0
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GPG Key ID: 2F4E54D35C8390CB
1 changed files with 34 additions and 14 deletions
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48
embassy-nrf/src/qspi.rs
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@ -12,18 +12,9 @@ use crate::interrupt::{Interrupt, InterruptExt};
pub use crate::pac::qspi::ifconfig0::{
ADDRMODE_A as AddressMode, PPSIZE_A as WritePageSize, READOC_A as ReadOpcode, WRITEOC_A as WriteOpcode,
};
pub use crate::pac::qspi::ifconfig1::SPIMODE_A as SpiMode;
use crate::{pac, Peripheral};
// TODO
// - config:
// - 32bit address mode
// - SPI freq
// - SPI sck delay
// - Deep power down mode (DPM)
// - SPI mode 3
// - activate/deactivate
// - set gpio in high drive
pub struct DeepPowerDownConfig {
/// Time required for entering DPM, in units of 16us
pub enter_time: u16,
@ -31,6 +22,25 @@ pub struct DeepPowerDownConfig {
pub exit_time: u16,
}
pub enum Frequency {
M32 = 0,
M16 = 1,
M10_7 = 2,
M8 = 3,
M6_4 = 4,
M5_3 = 5,
M4_6 = 6,
M4 = 7,
M3_6 = 8,
M3_2 = 9,
M2_9 = 10,
M2_7 = 11,
M2_5 = 12,
M2_3 = 13,
M2_1 = 14,
M2 = 15,
}
#[non_exhaustive]
pub struct Config {
pub xip_offset: u32,
@ -38,6 +48,12 @@ pub struct Config {
pub write_opcode: WriteOpcode,
pub write_page_size: WritePageSize,
pub deep_power_down: Option<DeepPowerDownConfig>,
pub frequency: Frequency,
/// Value is specified in number of 16 MHz periods (62.5 ns)
pub sck_delay: u8,
/// Whether data is captured on the clock rising edge and data is output on a falling edge (MODE0) or vice-versa (MODE3)
pub spi_mode: SpiMode,
pub address_mode: AddressMode,
}
impl Default for Config {
@ -48,6 +64,10 @@ impl Default for Config {
xip_offset: 0,
write_page_size: WritePageSize::_256BYTES,
deep_power_down: None,
frequency: Frequency::M8,
sck_delay: 80,
spi_mode: SpiMode::MODE0,
address_mode: AddressMode::_24BIT,
}
}
}
@ -102,7 +122,7 @@ impl<'d, T: Instance, const FLASH_SIZE: usize> Qspi<'d, T, FLASH_SIZE> {
r.psel.io3.write(|w| unsafe { w.bits(io3.psel_bits()) });
r.ifconfig0.write(|w| {
w.addrmode().variant(AddressMode::_24BIT);
w.addrmode().variant(config.address_mode);
w.dpmenable().bit(config.deep_power_down.is_some());
w.ppsize().variant(config.write_page_size);
w.readoc().variant(config.read_opcode);
@ -119,10 +139,10 @@ impl<'d, T: Instance, const FLASH_SIZE: usize> Qspi<'d, T, FLASH_SIZE> {
}
r.ifconfig1.write(|w| unsafe {
w.sckdelay().bits(80);
w.sckdelay().bits(config.sck_delay);
w.dpmen().exit();
w.spimode().mode0();
w.sckfreq().bits(3);
w.spimode().variant(config.spi_mode);
w.sckfreq().bits(config.frequency as u8);
w
});