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|
//! ISSI Serial NOR Flash.
//!
//! The same algorithm will query the flash part to differentiate
//! the 3.3V part ("LP") from the 1.8V part ("WP"). Sequences and
//! configurations vary by part. Replace the W and L with 'x'.
use super::*;
use crate::{ImxrtFlashAlgorithm, sequences::common as sequences};
pub type Is25xP128 = Issi<{ 128 / 8 * 1024 * 1024 }>;
/// An ISSI serial NOR flash driver.
pub struct Issi<const FLASH_CAPACITY_BYTES: usize>;
const ISSI_WP_MEM_TYPE: u8 = 0x70;
const ISSI_LP_MEM_TYPE: u8 = 0x60;
impl<const FLASH_CAPACITY_BYTES: usize> ImxrtFlashAlgorithm for Issi<FLASH_CAPACITY_BYTES> {
const FLASH_CAPACITY_BYTES: usize = FLASH_CAPACITY_BYTES;
const FLASH_PAGE_SIZE_BYTES: usize = 256;
const FLASH_SECTOR_SIZE_BYTES: usize = 4096;
fn initialize(flexspi: imxrt_drivers_flexspi::Instance) {
defmt::assert_eq!(
READ_ID_JEDEC_ID,
defmt::unwrap!(crate::install_ip_cmd(
flexspi,
READ_ID_JEDEC_ID.seq_id,
&[sequences::SEQ_READ_ID_JEDEC_ID]
))
);
let jedec_id = super::read_jedec_id(flexspi);
defmt::assert_eq!(jedec_id.mnf_id, 0x9D);
let (dummy_cycles, set_read_params_data) = match jedec_id.mem_type {
ISSI_WP_MEM_TYPE => (15, 15 << 3),
ISSI_LP_MEM_TYPE => (10, (0b111 << 5) | (0b11) << 3),
_ => defmt::panic!("{=u8:#X}", jedec_id.mem_type),
};
defmt::assert_eq!(
READ,
defmt::unwrap!(crate::install_ip_cmd(
flexspi,
READ.seq_id,
&[sequences::seq_fast_read_quad_io(dummy_cycles)],
))
);
defmt::assert_eq!(
SET_READ_PARAMS,
defmt::unwrap!(crate::install_ip_cmd(
flexspi,
SET_READ_PARAMS.seq_id,
&[sequences::SEQ_SET_READ_PARAMS_VOL]
))
);
defmt::assert_eq!(
WRITE_ENABLE,
defmt::unwrap!(crate::install_ip_cmd(
flexspi,
WRITE_ENABLE.seq_id,
&[sequences::SEQ_WRITE_ENABLE]
))
);
defmt::assert_eq!(
ERASE_SECTOR,
defmt::unwrap!(crate::install_ip_cmd(
flexspi,
ERASE_SECTOR.seq_id,
&[sequences::SEQ_WRITE_ENABLE, sequences::SEQ_ERASE_SECTOR]
))
);
defmt::assert_eq!(
READ_STATUS,
defmt::unwrap!(crate::install_ip_cmd(
flexspi,
READ_STATUS.seq_id,
&[sequences::SEQ_READ_STATUS]
))
);
defmt::assert_eq!(
PAGE_PROGRAM,
defmt::unwrap!(crate::install_ip_cmd(
flexspi,
PAGE_PROGRAM.seq_id,
&[
sequences::SEQ_WRITE_ENABLE,
sequences::SEQ_PAGE_PROGRAM_QUAD_INPUT
]
))
);
defmt::assert_eq!(
CHIP_ERASE,
defmt::unwrap!(crate::install_ip_cmd(
flexspi,
CHIP_ERASE.seq_id,
&[sequences::SEQ_WRITE_ENABLE, sequences::SEQ_ERASE_CHIP]
))
);
defmt::assert_eq!(
RESET,
defmt::unwrap!(crate::install_ip_cmd(
flexspi,
RESET.seq_id,
&[sequences::SEQ_RSTEN, sequences::SEQ_RST]
))
);
let set_read_params_data = [set_read_params_data];
crate::start_ip_cmd(flexspi, SET_READ_PARAMS, 0, &set_read_params_data);
crate::transmit_bytes(flexspi, &set_read_params_data);
crate::wait_for_ip_cmd_done(flexspi);
crate::clear_tx_fifo(flexspi);
crate::wait_for_idle(flexspi);
}
}
|
